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A260978 Number of (n+2)X(6+2) 0..1 arrays with each 3X3 subblock having clockwise perimeter pattern 00000001 00001001 or 00100101 1
2755, 1873, 2576, 5506, 9144, 18706, 30418, 62878, 107802, 218342, 372200, 752768, 1301722, 2647272, 4577194, 9211590, 16034066, 32273054, 56601764, 112913040, 198964362, 395528584, 701501654, 1386971610, 2469037804, 4864090436 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 6 of A260980

LINKS

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

FORMULA

Empirical: a(n) = 4*a(n-2) +4*a(n-4) +5*a(n-5) -24*a(n-6) -16*a(n-7) -5*a(n-8) -19*a(n-9) +45*a(n-10) +52*a(n-11) +93*a(n-12) +99*a(n-13) -146*a(n-14) -41*a(n-15) -248*a(n-16) -361*a(n-17) -18*a(n-18) +74*a(n-19) +403*a(n-20) +114*a(n-21) +370*a(n-22) +526*a(n-23) -274*a(n-24) -928*a(n-25) -347*a(n-26) +126*a(n-27) -792*a(n-28) -714*a(n-29) +668*a(n-30) +1443*a(n-31) -752*a(n-32) +268*a(n-33) +1848*a(n-34) -636*a(n-35) -1068*a(n-36) +1048*a(n-37) +576*a(n-38) -1660*a(n-39) -320*a(n-40) +808*a(n-41) -32*a(n-42) -380*a(n-43) +16*a(n-44) +192*a(n-45) for n>51

EXAMPLE

Some solutions for n=4

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

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

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

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

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

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

CROSSREFS

Cf. A260980

Sequence in context: A117081 A164065 A014487 * A043665 A198451 A205288

Adjacent sequences:  A260975 A260976 A260977 * A260979 A260980 A260981

KEYWORD

nonn

AUTHOR

R. H. Hardin, Aug 06 2015

STATUS

approved

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Last modified June 19 08:25 EDT 2018. Contains 305581 sequences. (Running on oeis4.)