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A297952 Number of n X n 0..1 arrays with every element equal to 1, 2, 4 or 5 king-move adjacent elements, with upper left element zero. 0
0, 3, 15, 78, 681, 11283, 483929, 22145365, 2092206702, 397080534452 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Diagonal of A297959.

LINKS

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

EXAMPLE

Some solutions for n=6

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

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

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

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

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

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

CROSSREFS

Cf. A297959.

Sequence in context: A027911 A227954 A104530 * A298771 A298576 A299568

Adjacent sequences:  A297949 A297950 A297951 * A297953 A297954 A297955

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jan 09 2018

STATUS

approved

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Last modified May 21 09:30 EDT 2022. Contains 353908 sequences. (Running on oeis4.)