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 A224056 #8 Jul 23 2025 04:58:33 %S A224056 239,10511,164781,1442005,9064541,46853641,212819499,880290006, %T A224056 3395883003,12434367863,43748614669,149023329961,493368821453, %U A224056 1589792417862,4986883506257,15223339574692,45212829646621 %N A224056 Number of nX7 0..2 arrays with rows and columns unimodal and antidiagonals nondecreasing. %C A224056 Column 7 of A224057 %H A224056 R. H. Hardin, <a href="/A224056/b224056.txt">Table of n, a(n) for n = 1..58</a> %H A224056 R. H. Hardin, <a href="/A224056/a224056.txt">Empirical polynomial of degree 28</a> %F A224056 Empirical polynomial of degree 28 (see link above) %e A224056 Some solutions for n=3 %e A224056 ..0..0..0..0..0..0..2....0..0..0..0..0..2..1....0..0..0..0..0..0..2 %e A224056 ..0..0..0..1..1..2..2....0..0..0..2..2..2..0....0..0..0..1..1..2..0 %e A224056 ..1..1..1..1..2..2..2....0..2..2..2..2..2..0....1..2..2..2..2..1..0 %K A224056 nonn %O A224056 1,1 %A A224056 _R. H. Hardin_ Mar 30 2013