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A317868 Number of n X 5 0..1 arrays with every element unequal to 2, 3 or 5 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero. 1

%I #6 Mar 15 2023 11:53:48

%S 0,4,4,88,220,759,3303,11807,45995,161983,600598,2215104,8089252,

%T 30099028,109674718,406751671,1486387672,5496201882,20148470577,

%U 74325953662,272963769305,1005515372431,3696468960096,13607350428609

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

%C Column 5 of A317871.

%H R. H. Hardin, <a href="/A317868/b317868.txt">Table of n, a(n) for n = 1..210</a>

%e Some solutions for n=5

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

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

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

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

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

%Y Cf. A317871.

%K nonn

%O 1,2

%A _R. H. Hardin_, Aug 09 2018

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Last modified May 8 02:27 EDT 2024. Contains 372317 sequences. (Running on oeis4.)