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 A223304 #6 Jul 23 2025 03:58:47 %S A223304 36864,28515132,28402185108,29706324866280,31982581839418764, %T A223304 34624128327772135980,37878775658906097327552, %U A223304 41350061045665728593745804,45417884615768221932462708276,49696230571397332338931201937088 %N A223304 4X4X4 triangular graph coloring a rectangular array: number of nX7 0..9 arrays where 0..9 label nodes of a graph with edges 0,1 0,2 1,2 1,3 1,4 2,4 3,4 2,5 4,5 3,6 3,7 4,7 6,7 4,8 5,8 7,8 5,9 8,9 and every array movement to a horizontal or vertical neighbor moves along an edge of this graph. %C A223304 Column 7 of A223305 %H A223304 R. H. Hardin, <a href="/A223304/b223304.txt">Table of n, a(n) for n = 1..210</a> %e A223304 Some solutions for n=3 %e A223304 ..0..1..0..2..1..2..4....0..1..0..2..4..8..4....0..1..0..2..4..7..4 %e A223304 ..1..0..1..4..3..4..3....1..0..1..4..2..4..1....1..0..1..0..2..4..5 %e A223304 ..0..1..0..2..1..2..1....0..1..0..1..4..1..3....0..1..0..1..0..2..4 %K A223304 nonn %O A223304 1,1 %A A223304 _R. H. Hardin_ Mar 19 2013