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A316119 Number of nX4 0..1 arrays with every element unequal to 0, 2, 3, 5, 6 or 7 king-move adjacent elements, with upper left element zero. 1
1, 13, 23, 56, 213, 702, 2524, 9034, 33185, 120129, 440997, 1617873, 5923243, 21727149, 79684290, 292246407, 1071890143, 3931760361, 14421679034, 52899023769, 194038043140, 711745909568, 2610741818016, 9576434659125 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,2
COMMENTS
Column 4 of A316123.
LINKS
FORMULA
Empirical recurrence of order 70 (see link above)
EXAMPLE
Some solutions for n=5
..0..1..1..0. .0..0..0..1. .0..1..1..1. .0..0..0..1. .0..0..0..0
..1..0..1..0. .1..1..0..0. .1..0..0..0. .1..1..1..0. .1..1..1..1
..1..0..0..0. .1..0..1..0. .0..1..1..0. .1..0..0..0. .1..0..0..1
..0..1..1..0. .0..0..1..0. .1..0..0..1. .1..0..1..0. .1..0..0..1
..1..0..0..1. .1..1..0..1. .0..1..1..0. .0..1..1..0. .1..0..0..1
CROSSREFS
Cf. A316123.
Sequence in context: A194156 A139863 A304672 * A046862 A155093 A147443
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jun 24 2018
STATUS
approved

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Last modified June 18 18:14 EDT 2024. Contains 373486 sequences. (Running on oeis4.)