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A297936
Number of n X n 0..1 arrays with every element equal to 0, 2, 3 or 5 king-move adjacent elements, with upper left element zero.
0
1, 5, 4, 33, 330, 3977, 76374, 2200020, 90659562, 5508084254
(list; graph; refs; listen; history; text; internal format)
OFFSET
1,2
COMMENTS
Diagonal of A297943.
LINKS
Table of n, a(n) for n=1..10.
EXAMPLE
Some solutions for n=7
..0..1..1..1..1..0..0. .0..0..0..1..0..0..0. .0..0..1..1..1..1..0
..1..1..0..0..1..0..1. .0..1..1..0..1..0..1. .0..1..0..0..0..1..1
..1..0..1..0..0..0..0. .1..0..1..0..1..1..1. .0..1..1..0..1..1..0
..1..0..0..1..0..1..0. .1..0..1..0..1..0..0. .0..0..0..1..0..0..0
..1..0..1..0..0..1..1. .0..1..1..0..1..0..0. .0..1..0..1..0..1..0
..1..1..0..1..0..1..0. .1..0..1..0..1..1..1. .0..1..1..0..1..1..0
..0..1..1..0..1..1..1. .1..1..0..0..1..0..1. .0..0..0..0..0..0..0
CROSSREFS
Cf. A297943.
Sequence in context: A157101 A237648 A091001 * A298548 A078811 A093399
Adjacent sequences: A297933 A297934 A297935 * A297937 A297938 A297939
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jan 09 2018
STATUS
approved

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Last modified November 6 23:44 EST 2024. Contains 377523 sequences.
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