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A260926
Number of (n+2) X (7+2) 0..1 arrays with each 3 X 3 subblock having clockwise perimeter pattern 00010101 00101011 or 01010101.
1
883, 1528, 7680, 25690, 82766, 253264, 971381, 2901724, 10470430, 32212024, 118158061, 357207408, 1307239067, 3983812562, 14565958591, 44252940160, 161970281879, 492560981246, 1801700119918, 5477908769440, 20043051801535
OFFSET
1,1
COMMENTS
Column 7 of A260927.
LINKS
FORMULA
Empirical: a(n) = a(n-2) +91*a(n-4) +334*a(n-6) -779*a(n-8) -3685*a(n-10) +7226*a(n-12) +20922*a(n-14) -62627*a(n-16) -27148*a(n-18) +249596*a(n-20) -142965*a(n-22) -601602*a(n-24) +1185157*a(n-26) -586527*a(n-28) -552103*a(n-30) +736485*a(n-32) -49406*a(n-34) -272061*a(n-36) +63499*a(n-38) +50155*a(n-40) -1001*a(n-42) -4198*a(n-44) -4416*a(n-46) -1042*a(n-48) -51*a(n-50) -100*a(n-52) -10*a(n-54) for n>59.
EXAMPLE
Some solutions for n=4
..0..1..0..0..0..1..0..1..0....1..0..0..1..0..0..0..1..0
..0..0..1..0..1..0..1..0..0....1..0..1..0..1..0..1..0..0
..0..1..0..1..0..1..0..1..0....0..1..0..1..0..1..0..1..0
..1..0..1..0..0..0..1..0..1....1..0..1..0..1..0..1..0..1
..0..0..0..1..0..1..0..1..0....0..0..0..1..0..1..0..0..0
..1..0..1..0..1..0..1..0..0....0..1..1..0..0..0..1..0..1
CROSSREFS
Cf. A260927.
Sequence in context: A207579 A207054 A096992 * A129470 A129471 A023312
KEYWORD
nonn
AUTHOR
R. H. Hardin, Aug 04 2015
STATUS
approved