A316172 - OEIS

A316172

Number of nX4 0..1 arrays with every element unequal to 1, 2, 4, 5, 6 or 7 king-move adjacent elements, with upper left element zero.

2, 10, 34, 72, 331, 1425, 5297, 18573, 84658, 341907, 1283578, 5514353, 22476568, 88705477, 368744149, 1503571517, 6058762423, 24862968921, 101355031741, 411492561255, 1680909735969, 6851310177747, 27886986592236, 113739441284254

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OFFSET

1,1

COMMENTS

Column 4 of A316176.

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..210

R. H. Hardin, Empirical recurrence of order 64

FORMULA

Empirical recurrence of order 64 (see link above)

EXAMPLE

Some solutions for n=5

..0..0..0..1. .0..0..0..1. .0..1..0..0. .0..1..1..0. .0..0..0..0

..1..0..0..1. .0..1..1..1. .1..0..0..1. .0..0..0..0. .1..0..0..1

..0..0..0..0. .0..0..0..1. .0..0..0..0. .0..0..0..0. .0..0..0..0

..1..0..0..1. .1..0..1..0. .0..1..0..0. .1..0..0..1. .1..0..0..1

..0..0..1..0. .0..0..0..0. .0..0..1..0. .1..0..0..0. .0..0..0..0

CROSSREFS

Cf. A316176.

Sequence in context: A240407 A372190 A043004 * A108100 A059924 A304159

Adjacent sequences: A316169 A316170 A316171 * A316173 A316174 A316175

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jun 25 2018

STATUS

approved