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A305220 Number of nX5 0..1 arrays with every element unequal to 2, 3, 5, 6 or 7 king-move adjacent elements, with upper left element zero. 1
0, 18, 31, 170, 792, 3759, 18876, 90956, 474685, 2426611, 12314640, 63224089, 324415176, 1661929097, 8516748514, 43702916079, 224090240059, 1149079576777, 5893973921589, 30227924527477, 155026753983222, 795103603034446 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,2
COMMENTS
Column 5 of A305223.
LINKS
EXAMPLE
Some solutions for n=5
..0..1..0..0..1. .0..1..0..0..1. .0..1..1..0..1. .0..1..1..0..1
..0..1..1..0..1. .1..0..1..0..1. .1..0..0..1..0. .0..1..0..1..0
..0..0..0..1..1. .0..1..1..0..1. .1..1..0..1..0. .0..1..0..0..0
..1..1..1..0..1. .1..0..1..0..1. .1..0..0..0..0. .0..0..1..1..0
..0..1..0..0..1. .0..1..0..0..1. .1..0..1..0..1. .1..0..0..1..0
CROSSREFS
Cf. A305223.
Sequence in context: A101140 A287683 A182254 * A316798 A070744 A137600
KEYWORD
nonn
AUTHOR
R. H. Hardin, May 27 2018
STATUS
approved

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Last modified March 28 13:19 EDT 2024. Contains 371254 sequences. (Running on oeis4.)