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 A223932 #6 Oct 13 2021 00:57:23 %S A223932 239,10511,142177,1065625,5773556,26250443,108796955,427868778, %T A223932 1623374603,5968786086,21245965257,73014123464,241654125566, %U A223932 769129639555,2353337396568,6926814314231,19640014398963,53740631657012 %N A223932 Number of n X 7 0..2 arrays with rows, columns and antidiagonals unimodal and diagonals nondecreasing. %C A223932 Column 7 of A223933. %H A223932 R. H. Hardin, <a href="/A223932/b223932.txt">Table of n, a(n) for n = 1..39</a> %e A223932 Some solutions for n=3 %e A223932 ..0..0..2..0..0..0..0....0..1..1..2..0..0..0....0..0..0..0..1..1..0 %e A223932 ..0..1..2..2..2..0..0....0..2..2..2..2..1..0....0..0..1..2..1..1..1 %e A223932 ..0..1..2..2..2..2..2....2..2..2..2..2..2..2....0..0..1..1..2..2..2 %Y A223932 Cf. A223933. %K A223932 nonn %O A223932 1,1 %A A223932 _R. H. Hardin_ Mar 29 2013