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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.

A223755 Number of n X n 0..3 arrays with rows, antidiagonals and columns unimodal.

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%I A223755 #7 Jul 23 2025 04:28:19
%S A223755 4,256,61733,26631193,15947472102,12025063773557,10962346407561257,
%T A223755 11777774040586957640
%N A223755 Number of n X n 0..3 arrays with rows, antidiagonals and columns unimodal.
%C A223755 Diagonal of A223762
%e A223755 Some solutions for n=3
%e A223755 ..0..1..3....1..2..3....2..3..0....0..2..0....2..3..0....0..3..2....0..0..2
%e A223755 ..1..3..2....0..0..2....3..2..0....0..2..3....2..2..2....2..3..3....0..3..3
%e A223755 ..3..0..0....0..0..1....3..2..0....1..3..2....2..2..2....1..2..2....3..1..0
%K A223755 nonn
%O A223755 1,1
%A A223755 _R. H. Hardin_ Mar 27 2013

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