This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A091176 #6 Jan 23 2013 19:27:25 %S A091176 4,7,11,20,25,31,46,53,68,87,106,118,152,163,190,204,247,344,377,418, %T A091176 436,474,492,516,558,580,647,669,713,816,894,975,1003,1028,1179,1300, %U A091176 1392,1526,1561,1695,1768,1917,1952,2069,2177,2343,2601,2643,2769,2812 %N A091176 Numbers n such that prime(n) is of the form 2*k^2 - 1. %C A091176 A066436 indexed by A000040. %H A091176 Harvey P. Dale, <a href="/A091176/b091176.txt">Table of n, a(n) for n = 1..1000</a> %F A091176 A000040(n) = A066436(n). %t A091176 Flatten[Position[Prime[Range[3000]],_?(IntegerQ[Surd[(#+1)/2,2]]&)]] (* _Harvey P. Dale_, Jan 23 2013 *) %Y A091176 Cf. A066049, A066436, A090697, A110558. %K A091176 nonn %O A091176 1,1 %A A091176 _Ray Chandler_, Dec 25 2003