NoNameRockBand
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27 Dec 2007, 2:20 pm
27 Dec 2007, 2:29 pm
iamnotaparakeet
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richie
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27 Dec 2007, 2:48 pm
28
Second Perfect Number and a Triangular number
Prime.
Fourth in the Primes of the form n²+n+17. Series...
The year after that same terrible age. (thank God I'm not there yet!)
31 is the "Emirp" of 13
13²=169
31²=961
The fifth in the Primes of the form n²+n+11. Series
Mersenne Prime 2^5 - 1 = 31
33 A Palindromic Number
34 Is a Fibonacci nuber
35 is a Tetrahedral Number
Tetrahedral Number
Last edited by richie on 27 Dec 2007, 4:38 pm, edited 3 times in total.
iamnotaparakeet
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richie
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27 Dec 2007, 4:29 pm
richie
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27 Dec 2007, 6:25 pm
iamnotaparakeet
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27 Dec 2007, 6:48 pm
38
2*19
That is just cool, would that be similar to the center square numbers? Checked out center cube numbers, they grow pretty quickly. But that's due to the difference between volume and surface area. ...what does this have to do with PIN diodes...
SilverProteus
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27 Dec 2007, 6:57 pm
39
40-1
Because I'm boring 
richie
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27 Dec 2007, 7:03 pm
2*19
That is just cool, would that be similar to the center square numbers? Checked out center cube numbers, they grow pretty quickly. But that's due to the difference between volume and surface area. ...what does this have to do with PIN diodes...
Centered-square numbers are the sum of two consecutive squares and are the Hypotenuse of Pythagorean triples as demonstrated
at number 25 earlier. 1,5,13,25,...... Check out the Online Encyclopedia of Integer Sequences:
http://www.research.att.com/~njas/sequences/A001844
39
Cardinal 39
thirty-nine
Ordinal 39th
thirty-ninth
Factorization 3X13
Divisors 1, 3, 13, 39
Roman numeral XXXIX
Binary 100111
Hexadecimal 27
Last edited by richie on 27 Dec 2007, 9:31 pm, edited 2 times in total.
richie
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27 Dec 2007, 7:07 pm
40-1
Because I'm boring
40 Lashes with a wet noodle!! !!
iamnotaparakeet
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27 Dec 2007, 7:36 pm
27 Dec 2007, 7:46 pm
6 x 9 
richie
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27 Dec 2007, 7:51 pm
n^2 + (n - 1)^2
5^2 + (5 - 1)^2
25 + 4^2 = 25 + 16 = 41
And the first Prime of the Primes of the form n²+n+41. series.
Some times known as The Great Quadratic Primes series
discovered by Leonhard Euler.
42 "The Meaning of life!! !"
iamnotaparakeet
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27 Dec 2007, 10:19 pm
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