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 A191863 #19 Jul 22 2020 11:37:04 %S A191863 1,1,3,1,2,1,3,5,1,1,39,3,1,1,78,7,1,13,4,1,3,5,3,9,1,11,1,1,2,5,1, %T A191863 477,389,3,51,11,1,5,2175,5,33,7,2,6,1,41571,44,5,11,3201,13,1,11,9,3, %U A191863 11,37,2999,7,1,127539,8,1,57003,3,17,5,15,1,1,1,17 %N A191863 Second member of a pair of numbers occurring in the definition of 2-happy couples. %C A191863 a(n) is odd, as is A191862(n). %H A191863 Reinhard Zumkeller, <a href="/A191863/b191863.txt">Table of n, a(n) for n = 1..99</a> %H A191863 J. H. Conway, <a href="http://www.cs.uwaterloo.ca/journals/JIS/happy.html">On Happy Factorizations</a>, J. Integer Sequences, Vol. 1, 1998, #1. %H A191863 <a href="/A007968/a007968.txt">Initial Happy Factorization Data</a> %o A191863 (Haskell) %o A191863 a191863 = snd . sqrtPair . a007970 %o A191863 -- Function sqrtPair is defined in A007968. %o A191863 -- _Reinhard Zumkeller_, Oct 11 2015 %Y A191863 Cf. A007968, A007970. %K A191863 nonn %O A191863 1,3 %A A191863 _Reinhard Zumkeller_, Jun 18 2011 %E A191863 Wrong comment and wrong formula removed (thanks to _Wolfdieter Lang_, who pointed this out) by _Reinhard Zumkeller_, Oct 11 2015