cp's OEIS Frontend

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.

A250912 Number of (n+1) X (7+1) 0..2 arrays with no 2 X 2 subblock having its maximum diagonal element less than its minimum antidiagonal element.

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%I A250912 #6 May 25 2024 23:38:12
%S A250912 21553018,72721157625,245114118899485,826125782084148708,
%T A250912 2784331051704024117237,9384142308556191112974969,
%U A250912 31627738616791159166366474706,106596185653227343496197522538691
%N A250912 Number of (n+1) X (7+1) 0..2 arrays with no 2 X 2 subblock having its maximum diagonal element less than its minimum antidiagonal element.
%C A250912 Column 7 of A250913.
%H A250912 R. H. Hardin, <a href="/A250912/b250912.txt">Table of n, a(n) for n = 1..210</a>
%e A250912 Some solutions for n=1
%e A250912 ..0..0..0..0..0..0..1..1....0..0..0..0..1..0..0..2....0..0..0..0..0..0..2..2
%e A250912 ..0..1..1..2..2..0..2..1....1..0..0..2..2..0..0..0....0..0..1..2..1..0..2..2
%Y A250912 Cf. A250913.
%K A250912 nonn
%O A250912 1,1
%A A250912 _R. H. Hardin_, Nov 28 2014