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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.

A224388 Number of nX5 0..3 arrays with diagonals and antidiagonals unimodal and rows nondecreasing.

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%I A224388 #6 Jul 23 2025 05:08:41
%S A224388 56,3136,102232,2332222,45648753,879830242,17642791909,365858453951,
%T A224388 7713944320142,163629606236587,3477919119488292,73997041686359692,
%U A224388 1575770012461089025,33581433844112168010,716050604542387047024
%N A224388 Number of nX5 0..3 arrays with diagonals and antidiagonals unimodal and rows nondecreasing.
%C A224388 Column 5 of A224391
%H A224388 R. H. Hardin, <a href="/A224388/b224388.txt">Table of n, a(n) for n = 1..210</a>
%e A224388 Some solutions for n=3
%e A224388 ..0..1..1..1..2....0..0..2..2..3....0..2..2..2..3....0..0..0..3..3
%e A224388 ..0..1..1..1..1....1..1..3..3..3....0..2..2..3..3....1..1..1..1..1
%e A224388 ..0..1..1..3..3....0..0..0..1..1....0..2..2..3..3....0..1..1..1..1
%K A224388 nonn
%O A224388 1,1
%A A224388 _R. H. Hardin_ Apr 05 2013

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