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A298174 Number of n X n 0..1 arrays with every element equal to 2, 3, 6 or 8 king-move adjacent elements, with upper left element zero. 0
0, 1, 0, 8, 34, 87, 181, 1380, 4176, 28357, 122406, 826418, 4451708, 30672159, 202655696, 1636350467 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,4

COMMENTS

Diagonal of A298177.

LINKS

Table of n, a(n) for n=1..16.

EXAMPLE

Some solutions for n=7

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

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

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

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

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

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

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

CROSSREFS

Cf. A298177.

Sequence in context: A024847 A154516 A212744 * A249743 A298140 A301887

Adjacent sequences:  A298171 A298172 A298173 * A298175 A298176 A298177

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jan 14 2018

STATUS

approved

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Last modified June 19 16:40 EDT 2021. Contains 345144 sequences. (Running on oeis4.)