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 A222280 #7 Nov 24 2014 06:10:04 %S A222280 15625,428830605,11770577485085,323081602357856985, %T A222280 8868023343395876315745,243411692308741298296892325, %U A222280 6681224184095576349599961437005,183387889786149096233229076843262145 %N A222280 Number of n X 7 0..5 arrays with no entry increasing mod 6 by 5 rightwards or downwards, starting with upper left zero. %C A222280 Column 7 of A222281. %e A222280 Some solutions for n=2: %e A222280 ..0..0..0..0..3..3..1....0..0..0..0..4..1..1....0..0..0..0..2..5..3 %e A222280 ..2..0..0..3..0..0..1....3..0..0..0..2..3..4....2..0..0..3..0..0..3 %Y A222280 Cf. A222281. %K A222280 nonn %O A222280 1,1 %A A222280 _R. H. Hardin_, Feb 14 2013