login
A300209
Number of n X n 0..1 arrays with every element equal to 0, 1, 2, 3, 4, 5, 7 or 8 king-move adjacent elements, with upper left element zero.
0
1, 8, 228, 22194, 7452385, 8664017314, 34824178698922, 483558835111191345, 23194796188589638077072
OFFSET
1,2
COMMENTS
Diagonal of A300215.
EXAMPLE
Some solutions for n=5
..0..0..0..0..0. .0..0..0..0..0. .0..0..0..0..0. .0..0..0..0..0
..0..1..0..1..0. .0..1..0..1..1. .0..1..0..0..0. .0..0..0..0..1
..1..0..1..0..1. .0..1..0..0..0. .0..1..1..1..1. .0..0..1..0..1
..0..1..1..0..1. .0..1..0..1..0. .0..1..1..0..1. .0..0..0..1..1
..0..0..0..0..0. .1..1..1..1..0. .1..0..0..1..1. .0..1..1..1..0
CROSSREFS
Cf. A300215.
Sequence in context: A320365 A317559 A302735 * A300798 A240299 A222525
KEYWORD
nonn
AUTHOR
R. H. Hardin, Feb 28 2018
STATUS
approved