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A298331 Number of n X n 0..1 arrays with every element equal to 1, 2, 3, 4 or 6 king-move adjacent elements, with upper left element zero. 0
0, 4, 113, 5663, 755110, 268494008, 242019919082, 559205410771472, 3316464212029290964 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Diagonal of A298337.

LINKS

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

EXAMPLE

Some solutions for n=4

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

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

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

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

CROSSREFS

Cf. A298337.

Sequence in context: A078780 A041377 A103499 * A299394 A299222 A300036

Adjacent sequences:  A298328 A298329 A298330 * A298332 A298333 A298334

KEYWORD

nonn,changed

AUTHOR

R. H. Hardin, Jan 17 2018

STATUS

approved

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Last modified June 4 05:37 EDT 2020. Contains 334816 sequences. (Running on oeis4.)