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 A214346 #8 Jul 22 2025 23:14:25 %S A214346 3,17,169,2853,80573,3778867,293207907,37563586269,7937469117891, %T A214346 2764964877941141,1587376056676684453,1501785457780559131093, %U A214346 2341332949071519298798233 %N A214346 Number of nXnXn triangular 0..2 arrays with no element lying outside the (possibly reversed) range delimited by its sw and se neighbors. %C A214346 Column 2 of A214352 %e A214346 Some solutions for n=3 %e A214346 ....2......2......0......1......1......1......1......0......0......2......1 %e A214346 ...0.2....2.1....0.2....1.1....1.1....2.1....2.0....2.0....0.1....0.2....1.2 %e A214346 ..0.2.1..2.0.1..0.2.2..1.0.1..0.2.1..2.2.1..1.2.0..2.2.0..0.0.2..2.0.2..0.1.2 %K A214346 nonn %O A214346 1,1 %A A214346 _R. H. Hardin_ Jul 13 2012