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A261378 Number of (n+2)X(6+2) 0..1 arrays with each 3X3 subblock having clockwise perimeter pattern 00001011 00010101 or 01010101. 1
247, 470, 1714, 5254, 14312, 42302, 128998, 377183, 1099308, 3261560, 9647696, 28358158, 83587624, 246835566, 727709732, 2144744412, 6325797274, 18656814748, 55007382412, 162201500248, 478326263928, 1410502041960, 4159149074114 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 6 of A261380.

LINKS

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

FORMULA

Empirical: a(n) = a(n-2) +54*a(n-4) +147*a(n-6) -232*a(n-8) -760*a(n-10) +1201*a(n-12) +1735*a(n-14) -4951*a(n-16) +1746*a(n-18) +4365*a(n-20) -3877*a(n-22) -2176*a(n-24) +4748*a(n-26) -2239*a(n-28) +25*a(n-30) +151*a(n-32) +117*a(n-34) -35*a(n-36) -2*a(n-38) -a(n-40) for n>44

EXAMPLE

Some solutions for n=4

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

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

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

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

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

CROSSREFS

Cf. A261380.

Sequence in context: A283737 A020313 A318055 * A063356 A250608 A127349

Adjacent sequences:  A261375 A261376 A261377 * A261379 A261380 A261381

KEYWORD

nonn

AUTHOR

R. H. Hardin, Aug 17 2015

STATUS

approved

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Last modified May 14 16:48 EDT 2021. Contains 343898 sequences. (Running on oeis4.)