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 A191860 #15 Jul 22 2020 11:37:04 %S A191860 1,2,2,3,3,1,18,4,4,13,1,3,5,5,3,70,1,1,6,6,3,3,32,59,3,4,7,7,9,182, %T A191860 11,2,1,5,23,1,29718,8,8,221,2,13,7,1,1068,1,39,5,9,9,3,378,7,500,11, %U A191860 5,45,151,1,5604,10,10,5,2,31,5,8890182,1,7,3,776,15 %N A191860 First member of a pair of numbers occurring in the definition of 1-happy couples. %H A191860 Reinhard Zumkeller, <a href="/A191860/b191860.txt">Table of n, a(n) for n = 1..200</a> %H A191860 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 A191860 <a href="/A007968/a007968.txt">Initial Happy Factorization Data</a> %o A191860 (Haskell) %o A191860 a191860 = fst . sqrtPair . a007969 %o A191860 Function sqrtPair is defined in A007968. %o A191860 -- _Reinhard Zumkeller_, Oct 11 2015 %Y A191860 Cf. A007968, A007969, A094048 (subsequence). %K A191860 nonn %O A191860 1,2 %A A191860 _Reinhard Zumkeller_, Jun 18 2011 %E A191860 Wrong comment and wrong formula removed (thanks to _Wolfdieter Lang_, who pointed this out) by _Reinhard Zumkeller_, Oct 11 2015