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 A059627 #5 Oct 04 2012 10:28:40 %S A059627 0,4,8,2,6,0,4,8,2,6,40,44,48,42,46,40,44,48,42,46,80,84,88,82,86,80, %T A059627 84,88,82,86,20,24,28,22,26,20,24,28,22,26,60,64,68,62,66,60,64,68,62, %U A059627 66,0,4,8,2,6,0,4,8,2,6,40,44,48,42,46,40,44,48,42,46,80,84,88,82,86 %N A059627 Generalized nim sum n + n + n + n in base 10; carryless multiplication 4 X n base 10. %H A059627 David Applegate, Marc LeBrun and N. J. A. Sloane, <a href="http://neilsloane.com/doc/carry1.pdf">Carryless Arithmetic (I): The Mod 10 Version</a>. %Y A059627 Cf. A001477 for carryless 1 X n, A004520 for carryless 2 X 10 base 10, A008592 for carryless 10 X n. %K A059627 base,nonn %O A059627 0,2 %A A059627 _Henry Bottomley_, Feb 19 2001