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 A116986 #4 Mar 30 2012 18:36:55 %S A116986 1,1,3,23,443,23131,3732309,2090705825,4388282355347 %N A116986 When convolved with itself and doubled, gives the sequence A000609. %C A116986 Do these numbers have any other interpretation? Are they always integers? %K A116986 nonn %O A116986 0,3 %A A116986 _Paul D. Hanna_, Apr 02 2006