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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.

A224044 Number of n X n 0..3 arrays with rows and columns unimodal and antidiagonals nondecreasing.

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%I A224044 #7 Jul 23 2025 04:56:40
%S A224044 4,160,9731,638996,41991129,2701569493,169750613182,10454910167463,
%T A224044 634179969235617,38050532050437859
%N A224044 Number of n X n 0..3 arrays with rows and columns unimodal and antidiagonals nondecreasing.
%C A224044 Diagonal of A224050
%e A224044 Some solutions for n=3
%e A224044 ..3..2..1....2..2..1....1..0..0....0..2..2....0..1..0....2..1..0....2..1..0
%e A224044 ..3..3..1....2..2..2....3..2..0....2..3..0....1..1..3....2..2..0....2..2..3
%e A224044 ..3..3..0....3..2..2....3..3..0....3..2..0....3..3..0....2..2..0....2..3..0
%K A224044 nonn
%O A224044 1,1
%A A224044 _R. H. Hardin_ Apr 01 2013

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