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 A195881 #5 Mar 30 2012 18:57:48 %S A195881 4,17,8,16,12,34,19,92,16,51,20,32,94,46,227,24,68,23,106,28,38,62, %T A195881 184,48,85,422,32,61,38,181,36,62,102,304,136,677,40,64,188,34,57,119, %U A195881 276,44,92,152,454,199,48,136,80,391,46,52,128,212,634,153,274,56 %N A195881 Positive integers c for which there is a (1/2)-Pythagorean triple (a,b,c) satisfying a<=b. %C A195881 See A195770 for definitions of k-Pythagorean triple, primitive k-Pythagorean triple, and lists of related sequences. %t A195881 (See A195879.) %Y A195881 Cf. A195770, A195879. %K A195881 nonn %O A195881 1,1 %A A195881 _Clark Kimberling_, Sep 25 2011