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A261289
Number of (n+2)X(5+2) 0..1 arrays with each 3X3 subblock having clockwise perimeter pattern 00000001 00010101 or 01010101.
1
307, 409, 1086, 2586, 6996, 17094, 48435, 115722, 323733, 784568, 2200256, 5297320, 14860295, 35870866, 100565666, 242543592, 680254258, 1640988402, 4601509246, 11100042154, 31128297887, 75088246466, 210566880369, 507941745824
OFFSET
1,1
COMMENTS
Column 5 of A261292.
LINKS
FORMULA
Empirical: a(n) = 3*a(n-2) +24*a(n-4) +17*a(n-6) -51*a(n-8) +22*a(n-10) -9*a(n-12) -7*a(n-14) +132*a(n-16) -142*a(n-18) +19*a(n-20) +91*a(n-22) -46*a(n-24) -157*a(n-26) +278*a(n-28) -211*a(n-30) +50*a(n-32) -8*a(n-34) +12*a(n-36) for n>41
EXAMPLE
Some solutions for n=4
..1..0..0..0..0..0..1....0..1..0..1..0..1..0....1..0..1..0..1..0..1
..0..0..0..1..0..1..0....0..0..1..0..1..0..1....0..0..0..1..0..1..0
..0..0..0..0..1..0..1....0..1..0..1..0..0..0....1..0..1..0..0..0..1
..0..1..0..1..0..0..0....1..0..1..0..1..0..0....0..1..0..1..0..1..0
..0..0..1..0..1..0..0....0..1..0..0..0..0..0....1..0..1..0..1..0..1
..0..1..0..0..0..0..0....0..0..1..0..0..0..0....0..1..0..1..0..0..0
CROSSREFS
Cf. A261292.
Sequence in context: A282594 A050201 A142376 * A142255 A309101 A098042
KEYWORD
nonn
AUTHOR
R. H. Hardin, Aug 14 2015
STATUS
approved