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A298390 Number of n X n 0..1 arrays with every element equal to 1, 2, 4, 5 or 6 king-move adjacent elements, with upper left element zero. 0
0, 3, 15, 112, 2231, 117184, 16510708, 4149393799, 2858791588717 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Diagonal of A298396.

LINKS

Table of n, a(n) for n=1..9.

EXAMPLE

Some solutions for n=5

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

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

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

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

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

CROSSREFS

Cf. A298396.

Sequence in context: A135083 A323772 A058104 * A299508 A299308 A300109

Adjacent sequences:  A298387 A298388 A298389 * A298391 A298392 A298393

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jan 18 2018

STATUS

approved

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Last modified August 18 22:45 EDT 2022. Contains 356215 sequences. (Running on oeis4.)