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 A195566 #5 Mar 30 2012 18:57:48 %S A195566 3,4,253,351,2849,15747,15996,1039997,1436799,11676801,64528003, %T A195566 65552004,4261904253,5888003551,47851526049,264435743747,268632095996, %U A195566 17465282591997,24129037113599,196095542073601,1083657613344003,1100854263840004 %N A195566 Numerators b(n) of Pythagorean approximations b(n)/a(n) to 5/4. %C A195566 See A195500 for discussion and list of related sequences; see A195565 for Mathematica program. %Y A195566 Cf. A195500, A195565, A195567. %K A195566 nonn %O A195566 1,1 %A A195566 _Clark Kimberling_, Sep 21 2011