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A298383 Number of n X n 0..1 arrays with every element equal to 1, 2, 3, 5 or 6 king-move adjacent elements, with upper left element zero. 0
0, 4, 56, 996, 49850, 3935913, 509195874, 190487814086, 121220201152514 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Diagonal of A298389.

LINKS

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

EXAMPLE

Some solutions for n=5

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

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

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

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

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

CROSSREFS

Cf. A298389.

Sequence in context: A297944 A298555 A240298 * A326289 A078533 A299302

Adjacent sequences:  A298380 A298381 A298382 * A298384 A298385 A298386

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jan 18 2018

STATUS

approved

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Last modified October 6 23:36 EDT 2022. Contains 357270 sequences. (Running on oeis4.)