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A298657 Number of nX5 0..1 arrays with every element equal to 1, 2, 4, 6 or 7 king-move adjacent elements, with upper left element zero. 1
3, 23, 23, 85, 177, 431, 876, 2137, 5002, 11687, 27591, 64253, 150967, 353682, 830580, 1954490, 4575013, 10742553, 25221766, 59150366, 138829820, 325959550, 764905062, 1795278490, 4214144288, 9890202526, 23212413440, 54483362577 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Column 5 of A298660.
LINKS
EXAMPLE
Some solutions for n=5
..0..1..0..1..1. .0..0..0..1..0. .0..0..0..1..1. .0..1..1..1..0
..1..0..1..0..0. .1..0..0..0..1. .1..0..0..0..0. .1..0..0..0..1
..0..1..0..1..0. .1..0..0..0..0. .1..0..0..1..1. .1..0..0..1..0
..1..0..1..0..0. .1..0..1..0..0. .0..0..0..1..0. .0..0..0..0..1
..0..1..0..1..1. .0..1..0..1..0. .1..1..1..0..1. .1..1..1..1..0
CROSSREFS
Cf. A298660.
Sequence in context: A298090 A298052 A298885 * A299609 A238198 A178177
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jan 24 2018
STATUS
approved

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Last modified February 27 04:15 EST 2024. Contains 370362 sequences. (Running on oeis4.)