A316644 - OEIS

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A316644

Number of nX4 0..1 arrays with every element unequal to 1, 2, 4, 5, 7 or 8 king-move adjacent elements, with upper left element zero.

2, 10, 33, 42, 277, 954, 2432, 10541, 39013, 126666, 482131, 1792255, 6319249, 23345602, 86360870, 313149450, 1150902364, 4244463411, 15539179620, 57111294927, 210353855214, 772739674178, 2841929193001, 10462902967671

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OFFSET

1,1

COMMENTS

Column 4 of A316648.

LINKS

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

R. H. Hardin, Empirical recurrence of order 69

FORMULA

Empirical recurrence of order 69 (see link above)

EXAMPLE

Some solutions for n=5

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

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

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

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

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

CROSSREFS

Cf. A316648.

Sequence in context: A004028 A263839 A236921 * A080668 A062453 A036369

Adjacent sequences: A316641 A316642 A316643 * A316645 A316646 A316647

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jul 09 2018

STATUS

approved