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A299091 Number of n X n 0..1 arrays with every element equal to 0, 1, 2, 4, 5 or 7 king-move adjacent elements, with upper left element zero. 0
1, 7, 20, 125, 2828, 42012, 2170819, 161247816, 20536604982, 5567500327979 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Diagonal of A299097.

LINKS

Table of n, a(n) for n=1..10.

EXAMPLE

Some solutions for n=5

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

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

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

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

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

CROSSREFS

Cf. A299097.

Sequence in context: A298214 A299346 A009370 * A299873 A009372 A051102

Adjacent sequences:  A299088 A299089 A299090 * A299092 A299093 A299094

KEYWORD

nonn

AUTHOR

R. H. Hardin, Feb 02 2018

STATUS

approved

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Last modified January 22 05:19 EST 2022. Contains 350481 sequences. (Running on oeis4.)