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A298828 Number of n X n 0..1 arrays with every element equal to 1, 3, 4, 5 or 8 king-move adjacent elements, with upper left element zero. 0
0, 4, 1, 68, 1590, 16551, 5097700, 2031564141, 1185589525594 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Diagonal of A298834.

LINKS

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

EXAMPLE

Some solutions for n=5

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

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

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

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

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

CROSSREFS

Cf. A298834.

Sequence in context: A278578 A069740 A173008 * A114917 A100864 A295178

Adjacent sequences:  A298825 A298826 A298827 * A298829 A298830 A298831

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jan 27 2018

STATUS

approved

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Last modified August 12 17:17 EDT 2020. Contains 336439 sequences. (Running on oeis4.)