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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.

A268247 Number of 3Xn 0..n arrays with every repeated value in every row greater than or equal to, and every column greater than, the previous repeated value.

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%I A268247 #3 Jan 29 2016 07:25:00
%S A268247 6,576,216000,197555340,371713931400,1257212773492866,
%T A268247 6967515866907769668,59102884914387317492904,
%U A268247 728462977173724674571341120,12523133152298313854607312469836
%N A268247 Number of 3Xn 0..n arrays with every repeated value in every row greater than or equal to, and every column greater than, the previous repeated value.
%C A268247 Row 3 of A268246.
%e A268247 Some solutions for n=2
%e A268247 ..2..1....2..1....2..0....1..2....2..0....1..0....0..0....2..0....0..0....1..0
%e A268247 ..0..0....1..1....1..1....0..2....1..0....2..1....1..2....2..1....2..2....0..1
%e A268247 ..1..1....0..2....2..2....0..1....2..1....0..1....2..2....0..1....0..0....0..0
%Y A268247 Cf. A268246.
%K A268247 nonn
%O A268247 1,1
%A A268247 _R. H. Hardin_, Jan 29 2016

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