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 A064644 #4 Mar 02 2015 16:08:47 %S A064644 1,2,1,1,5,6,22,21,13,1,1,45,84,104,105,631,630,562,412,211,1,1,1263, %T A064644 2500,3558,4285,4602,4603,39469,39468,37573,33180,26560,18305,9207,1, %U A064644 1,78939,157243,230496,293794,342944,375058,388869,388870,4327322 %N A064644 Array defined in A064643 read from left to right (cf. A107783). %e A064644 1; 2,1; 1,5,6; 22,21,13,1; ... %K A064644 nonn,tabl %O A064644 0,2 %A A064644 _Floor van Lamoen_, Oct 03 2001