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 A068729 #9 Mar 08 2024 16:07:19 %S A068729 1,9,2501,28905785,13336307324915,247753867499441888279, %T A068729 185592614324336736251073584343 %N A068729 Number of solenoidal flows (flow in = flow out) in an n X n square array with integer velocities in -4 .. 4. %Y A068729 By size 3 X 3, ..., 6 X 6 A068722-A068725, by velocity limit 1..13 A068726-A068738. %K A068729 nonn,more %O A068729 1,2 %A A068729 _R. H. Hardin_, Feb 26 2002 %E A068729 a(6)-a(7) from _Sean A. Irvine_, Mar 08 2024