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A298140 Number of n X n 0..1 arrays with every element equal to 2, 3, 6 or 7 king-move adjacent elements, with upper left element zero. 0
0, 1, 0, 8, 34, 92, 180, 1404, 4288, 29092, 125384, 859423, 4746446, 33970899, 232212614 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,4

COMMENTS

Diagonal of A298146.

LINKS

Table of n, a(n) for n=1..15.

EXAMPLE

Some solutions for n=7

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

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

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

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

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

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

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

CROSSREFS

Cf. A298146.

Sequence in context: A212744 A298174 A249743 * A301887 A208639 A240785

Adjacent sequences:  A298137 A298138 A298139 * A298141 A298142 A298143

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jan 13 2018

STATUS

approved

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Last modified September 26 12:04 EDT 2021. Contains 347665 sequences. (Running on oeis4.)