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A317462
Number of nX5 0..1 arrays with every element unequal to 2, 3, 4, 5, 6, 7 or 8 king-move adjacent elements, with upper left element zero.
1
0, 61, 636, 16809, 386855, 9178195, 217053933, 5142922330, 121842389647, 2886923933239, 68403529968491, 1620780281086663, 38403475477325272, 909949365172380123, 21560755938721401485, 510870432814905398479
OFFSET
1,2
COMMENTS
Column 5 of A317465.
FORMULA
Empirical recurrence of order 61 (see link above)
EXAMPLE
Some solutions for n=5
..0..1..0..1..0. .0..1..0..1..0. .0..0..0..0..1. .0..1..0..0..0
..1..1..0..1..0. .1..1..0..1..0. .1..1..0..1..0. .0..1..0..1..1
..0..0..1..0..1. .0..0..1..0..0. .0..0..1..0..0. .1..1..1..1..0
..0..1..1..1..0. .0..0..1..1..0. .0..0..0..1..1. .0..0..1..1..1
..0..1..0..0..1. .1..1..0..1..0. .1..1..1..1..0. .1..0..1..0..0
CROSSREFS
Cf. A317465.
Sequence in context: A316508 A068850 A142667 * A283869 A173805 A092571
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jul 28 2018
STATUS
approved