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 A214350 #7 Jul 22 2025 23:14:53 %S A214350 7,161,10507,1807653,790197579,861351043995,2318511875463567, %T A214350 15333331066778365463 %N A214350 Number of nXnXn triangular 0..6 arrays with no element lying outside the (possibly reversed) range delimited by its sw and se neighbors. %C A214350 Column 6 of A214352 %e A214350 Some solutions for n=3 %e A214350 ....2......3......3......3......4......4......3......3......2......2......6 %e A214350 ...6.1....1.4....4.1....3.4....4.1....2.4....1.5....3.1....2.0....2.5....5.6 %e A214350 ..2.6.1..5.0.4..6.1.0..3.6.4..4.3.0..3.2.5..1.6.0..4.1.2..5.0.0..2.5.0..3.6.0 %K A214350 nonn %O A214350 1,1 %A A214350 _R. H. Hardin_ Jul 13 2012