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 A214379 #5 Jul 22 2025 23:15:42 %S A214379 4,32,456,11048,445024,29456216,3183854216,560099178288, %T A214379 160085922224504,74273794007636336,55915904574400617168, %U A214379 68294422849744215469224 %N A214379 Number of nXnXn triangular 0..3 arrays with no element lying outside the (possibly reversed) range delimited by its sw and se neighbors, and no element equal to its horizontal neighbors. %C A214379 Column 3 of A214384 %e A214379 Some solutions for n=3 %e A214379 ....2......1......2......2......2......2......3......2......1......2......3 %e A214379 ...3.2....2.0....0.2....2.3....3.1....3.1....1.3....0.2....2.0....2.1....2.3 %e A214379 ..3.0.2..3.0.2..0.3.2..1.3.1..1.3.0..2.3.1..2.1.3..0.3.1..2.3.0..3.0.3..3.2.3 %K A214379 nonn %O A214379 1,1 %A A214379 _R. H. Hardin_ Jul 14 2012