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A269826 Number of nX5 0..4 arrays with some element plus some horizontally, diagonally, antidiagonally or vertically adjacent neighbor totalling four exactly once. 1

%I #4 Mar 05 2016 19:25:52

%S 1280,462680,90748696,16644595392,2840332868960,467693538063508,

%T 74936429415811576,11771832152564634464,1821445245786662249776,

%U 278444152926792624952684,42152783102393213438270928

%N Number of nX5 0..4 arrays with some element plus some horizontally, diagonally, antidiagonally or vertically adjacent neighbor totalling four exactly once.

%C Column 5 of A269829.

%H R. H. Hardin, <a href="/A269826/b269826.txt">Table of n, a(n) for n = 1..210</a>

%e Some solutions for n=1

%e ..1..2..4..4..0. .1..3..0..1..4. .0..3..2..2..1. .1..0..1..0..4

%Y Cf. A269829.

%K nonn

%O 1,1

%A _R. H. Hardin_, Mar 05 2016

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Last modified March 4 05:23 EST 2024. Contains 370522 sequences. (Running on oeis4.)