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A303415 Number of n X n 0..1 arrays with every element equal to 0, 1, 2, 3, 4 or 5 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero. 1

%I

%S 1,8,252,30897,14783632,27575294129,200493397340704,

%T 5683010875200460450,627998579658329070097348,

%U 270542136528524318473547313146,454367389836320183421616246521390670

%N Number of n X n 0..1 arrays with every element equal to 0, 1, 2, 3, 4 or 5 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.

%C Diagonal of A303421.

%H R. H. Hardin, <a href="/A303415/b303415.txt">Table of n, a(n) for n = 1..12</a>

%e Some solutions for n=5

%e ..0..0..0..0..0. .0..0..0..0..0. .0..0..0..0..0. .0..0..0..0..0

%e ..0..0..1..0..0. .0..0..0..1..1. .0..0..0..0..1. .0..0..1..0..0

%e ..0..1..1..1..0. .0..0..1..0..1. .0..1..1..0..1. .0..0..1..0..0

%e ..1..0..1..1..1. .1..1..1..1..0. .1..1..0..1..0. .0..1..0..0..1

%e ..1..1..0..1..0. .1..1..0..0..1. .1..0..1..1..0. .0..0..1..0..0

%Y Cf. A303421.

%K nonn

%O 1,2

%A _R. H. Hardin_, Apr 23 2018

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Last modified October 28 04:43 EDT 2021. Contains 348313 sequences. (Running on oeis4.)