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.

A302737 Number of nX4 0..1 arrays with every element equal to 0, 1, 2, 3 or 4 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.

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%I A302737 #4 Apr 12 2018 11:18:50
%S A302737 8,128,1637,21625,286631,3798398,50347423,667361051,8845980434,
%T A302737 117255120887,1554238778426,20601729761966,273079838843598,
%U A302737 3619725111303264,47980143627858744,635985913868386593
%N A302737 Number of nX4 0..1 arrays with every element equal to 0, 1, 2, 3 or 4 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.
%C A302737 Column 4 of A302741.
%H A302737 R. H. Hardin, <a href="/A302737/b302737.txt">Table of n, a(n) for n = 1..210</a>
%F A302737 Empirical: a(n) = 12*a(n-1) +20*a(n-2) -18*a(n-3) -326*a(n-4) -375*a(n-5) +241*a(n-6) +1721*a(n-7) +1034*a(n-8) -798*a(n-9) -966*a(n-10) +86*a(n-11) +278*a(n-12) -242*a(n-13) -348*a(n-14) -112*a(n-15)
%e A302737 Some solutions for n=5
%e A302737 ..0..0..0..1. .0..0..0..1. .0..0..1..0. .0..0..0..1. .0..0..1..0
%e A302737 ..0..0..1..1. .0..1..0..0. .0..1..0..0. .0..0..1..0. .1..0..1..1
%e A302737 ..1..0..0..1. .1..1..1..1. .1..1..0..1. .0..1..1..1. .0..0..1..1
%e A302737 ..0..1..1..0. .1..0..0..0. .0..0..1..1. .0..0..0..0. .0..0..1..1
%e A302737 ..1..0..1..0. .0..0..1..1. .1..0..1..0. .1..1..1..0. .0..0..1..0
%Y A302737 Cf. A302741.
%K A302737 nonn
%O A302737 1,1
%A A302737 _R. H. Hardin_, Apr 12 2018