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 A068731 #9 Mar 08 2024 15:13:12 %S A068731 1,13,10795,773568107,4598900066440609,2286173927365217148894607 %N A068731 Number of solenoidal flows (flow in = flow out) in an n X n square array with integer velocities in -6 .. 6. %Y A068731 By size 3 X 3, ..., 6 X 6 A068722-A068725, by velocity limit 1..13 A068726-A068738. %K A068731 nonn,more %O A068731 1,2 %A A068731 _R. H. Hardin_, Feb 26 2002 %E A068731 a(5)-a(6) from _Sean A. Irvine_, Mar 08 2024