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 A068754 #8 Jul 30 2017 22:22:10 %S A068754 1,2255,542131425,14285299502131463 %N A068754 Number of potential flows in n X n array with integer velocities in -7..7, i.e., number of n X n arrays with adjacent elements differing by no more than 7, counting arrays differing by a constant only once. %Y A068754 By size 3 X 3, ..., 6 X 6 A068744-A068747, by velocity limit 1..14 A068248-A068761, solenoidal flows A068722-A068738. %K A068754 nonn %O A068754 1,2 %A A068754 _R. H. Hardin_, Feb 27 2002