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 A254530 #4 Feb 01 2015 16:33:01 %S A254530 1,5,47,706,14313,374016,11997457,460158224,20671937025,1071624134224, %T A254530 63368460514401,4235641240358232,317640391931394049, %U A254530 26555904023833864616,2461223025846241927425,251574807412822558973536,28223316187761759785968641,3459174110134084070825015328,461154818319652703166752585377,66589665425419376047897811260040 %N A254530 a(n) = A181162(n) / n, n>=1. %Y A254530 Cf. A181162. %K A254530 nonn %O A254530 1,2 %A A254530 _Joerg Arndt_, Feb 01 2015