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A261379 Number of (n+2)X(7+2) 0..1 arrays with each 3X3 subblock having clockwise perimeter pattern 00001011 00010101 or 01010101. 1
392, 864, 3778, 12500, 39494, 128998, 461576, 1468008, 5004588, 16267396, 56289594, 180787146, 623643757, 2013680076, 6945409809, 22381289794, 77243050853, 249062829770, 859199611263, 2770077481724, 9558157038040 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 7 of A261380.

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..210

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

..1..0..1..0..1..0..1..0..1....0..1..0..1..0..1..0..0..0

..0..1..0..1..0..1..0..0..0....1..0..0..0..1..0..1..0..1

..1..0..0..0..1..0..1..0..1....0..1..0..1..0..1..0..1..0

..0..1..0..1..0..1..0..1..0....1..0..1..0..1..0..1..0..1

..1..0..1..0..1..0..1..0..0....0..1..0..1..0..1..0..1..0

..0..0..0..1..0..0..0..1..0....1..0..0..0..1..0..0..0..1

CROSSREFS

Cf. A261380.

Sequence in context: A035883 A235188 A248022 * A235313 A203917 A180295

Adjacent sequences:  A261376 A261377 A261378 * A261380 A261381 A261382

KEYWORD

nonn

AUTHOR

R. H. Hardin, Aug 17 2015

STATUS

approved

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Last modified July 1 04:13 EDT 2022. Contains 354951 sequences. (Running on oeis4.)