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 A214351 #7 May 08 2023 15:11:26 %S A214351 8,232,20840,5349708,3766437036,7118347901224,35699489509054494, %T A214351 472117658204259171294 %N A214351 Number of n X n X n triangular 0..7 arrays with no element lying outside the (possibly reversed) range delimited by its sw and se neighbors. %C A214351 Column 7 of A214352. %e A214351 Some solutions for n=3 %e A214351 ....4......4......3......6......4......0......4......2......5......0......2 %e A214351 ...0.6....7.0....3.2....5.6....4.1....0.0....2.5....1.3....6.3....0.7....6.1 %e A214351 ..0.2.7..7.0.5..2.3.2..3.6.0..0.7.1..0.0.2..0.6.3..1.2.3..1.7.1..0.0.7..6.0.7 %Y A214351 Cf. A214352. %K A214351 nonn %O A214351 1,1 %A A214351 _R. H. Hardin_, Jul 13 2012