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 A068751 #8 Jul 30 2017 22:23:19 %S A068751 1,489,9230193,6913624013061,207345516734034667209 %N A068751 Number of potential flows in n X n array with integer velocities in -4..4, i.e., number of n X n arrays with adjacent elements differing by no more than 4, counting arrays differing by a constant only once. %Y A068751 By size 3 X 3, ..., 6 X 6 A068744-A068747, by velocity limit 1..14 A068248-A068761, solenoidal flows A068722-A068738. %K A068751 nonn %O A068751 1,2 %A A068751 _R. H. Hardin_, Feb 27 2002