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A305043 Number of nX4 0..1 arrays with every element unequal to 0, 2, 3, 6 or 7 king-move adjacent elements, with upper left element zero. 2
1, 13, 9, 11, 20, 17, 25, 70, 67, 101, 292, 325, 485, 1318, 1679, 2521, 6284, 8945, 13753, 31542, 48955, 77781, 166412, 275213, 452509, 918598, 1587071, 2691137, 5266372, 9359801, 16275257, 31095926, 56231123, 99669125, 187634916, 342748925 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Column 4 of A305047.

LINKS

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

FORMULA

Empirical: a(n) = 3*a(n-1) -2*a(n-2) +4*a(n-3) -12*a(n-4) +6*a(n-5) +2*a(n-6) +3*a(n-7) -3*a(n-9) for n>13

EXAMPLE

Some solutions for n=5

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

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

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

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

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

CROSSREFS

Cf. A305047.

Sequence in context: A300377 A300679 A304137 * A066552 A206609 A281085

Adjacent sequences:  A305040 A305041 A305042 * A305044 A305045 A305046

KEYWORD

nonn

AUTHOR

R. H. Hardin, May 24 2018

STATUS

approved

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Last modified January 27 04:57 EST 2020. Contains 331291 sequences. (Running on oeis4.)