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 A194502 #7 Jul 22 2025 12:34:05 %S A194502 5,125,15804,9765630,30517578125,476837158203125,37252902986083985625 %N A194502 Number of lower triangles of an n X n 0..5 array with each element unequal to the sum mod 6 of its horizontal and vertical neighbors. %C A194502 Column 5 of A194505 %e A194502 Some solutions for 3X3 %e A194502 ..2......2......5......4......1......4......0......1......1......1......5 %e A194502 ..3.2....1.0....0.1....3.3....0.0....2.1....3.1....2.5....3.4....3.1....3.5 %e A194502 ..3.2.1..2.3.0..1.4.3..1.1.5..0.5.3..2.3.2..1.5.1..4.5.4..1.3.1..3.1.0..1.1.4 %K A194502 nonn %O A194502 1,1 %A A194502 _R. H. Hardin_ Aug 27 2011