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 A271032 #5 Apr 17 2022 22:26:04 %S A271032 0,112,5040,188034,6872424,255757328,9790184488,386105784866, %T A271032 15669594394610,653037680536962,27884254995169022,1217213333853178756 %N A271032 Number of n X n X n triangular 0..6 arrays with some element less than a w, nw or ne neighbor exactly once. %C A271032 Column 6 of A271034. %e A271032 Some solutions for n=4 %e A271032 .....0........0........1........1........1........1........1........0 %e A271032 ....0.1......2.2......0.2......1.1......1.1......0.2......1.2......0.0 %e A271032 ...1.4.5....2.3.4....0.2.2....2.2.5....3.5.5....2.2.2....1.2.2....0.0.4 %e A271032 ..1.2.5.5..5.3.4.4..4.4.4.5..6.6.6.5..2.5.5.5..6.6.6.6..3.3.2.3..4.4.5.4 %Y A271032 Cf. A271034. %K A271032 nonn %O A271032 1,2 %A A271032 _R. H. Hardin_, Mar 29 2016