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A305907 Number of nX4 0..1 arrays with every element unequal to 0, 1, 2, 4, 5 or 7 king-move adjacent elements, with upper left element zero. 1

%I #4 Jun 14 2018 06:57:27

%S 8,28,98,396,2075,9140,40412,189729,873060,3979064,18356703,84632174,

%T 389029015,1791954662,8257849953,38030907288,175204408009,

%U 807291828371,3719389877395,17136993336823,78962057731073,363828807655049

%N Number of nX4 0..1 arrays with every element unequal to 0, 1, 2, 4, 5 or 7 king-move adjacent elements, with upper left element zero.

%C Column 4 of A305911.

%H R. H. Hardin, <a href="/A305907/b305907.txt">Table of n, a(n) for n = 1..210</a>

%H R. H. Hardin, <a href="/A305907/a305907.txt">Empirical recurrence of order 69</a>

%F Empirical recurrence of order 69 (see link above)

%e Some solutions for n=5

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

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

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

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

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

%Y Cf. A305911.

%K nonn

%O 1,1

%A _R. H. Hardin_, Jun 14 2018

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Last modified February 26 19:20 EST 2024. Contains 370352 sequences. (Running on oeis4.)