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A303687
Number of nX5 0..1 arrays with every element unequal to 2, 3 or 4 king-move adjacent elements, with upper left element zero.
1
0, 61, 27, 343, 349, 2809, 4619, 29475, 59695, 312565, 749915, 3414709, 9159379, 37886863, 109856087, 425475373, 1300509341, 4819052399, 15264319545, 54916710773, 178135150965, 628466577459, 2071027274837, 7212819961559
OFFSET
1,2
COMMENTS
Column 5 of A303690.
FORMULA
Empirical recurrence of order 93 (see link above)
EXAMPLE
Some solutions for n=5
..0..0..1..0..1. .0..1..1..0..1. .0..1..1..0..1. .0..1..0..0..1
..1..1..0..0..1. .1..0..1..1..0. .0..1..1..0..0. .0..1..1..0..0
..0..1..1..0..0. .0..0..0..1..1. .1..1..0..0..1. .1..0..1..1..0
..0..1..1..0..1. .1..0..0..0..1. .0..1..0..0..1. .0..0..0..1..1
..1..0..0..1..0. .0..1..0..1..0. .1..0..1..1..0. .1..0..1..0..0
CROSSREFS
Cf. A303690.
Sequence in context: A002108 A087409 A199749 * A033381 A204748 A276471
KEYWORD
nonn
AUTHOR
R. H. Hardin, Apr 28 2018
STATUS
approved