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 A045840 #10 Jul 26 2017 09:19:13 %S A045840 0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,3,0,0,0,0,0,0,0,0,0,0,0,0,0,0, %T A045840 0,6,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,6,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,3, %U A045840 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,9,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,9,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,6 %N A045840 a(n) = A005926(n)/2. %H A045840 Antti Karttunen, <a href="/A045840/b045840.txt">Table of n, a(n) for n = 0..387</a> (computed from b-file of A005926 provided by Herman Jamke) %Y A045840 Cf. A005926. %K A045840 nonn %O A045840 0,20 %A A045840 _N. J. A. Sloane_ %E A045840 More terms (computed from those of A005926) by _Antti Karttunen_, Jul 24 2017