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A261290 Number of (n+2)X(6+2) 0..1 arrays with each 3X3 subblock having clockwise perimeter pattern 00000001 00010101 or 01010101. 1
540, 743, 2104, 6034, 17094, 51268, 153144, 446786, 1313726, 3893926, 11482268, 33790756, 99697166, 294209526, 867275046, 2557044420, 7542082102, 22241722888, 65583553668, 193403914160, 570355004810, 1681918109826, 4959816097134 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 6 of A261292.

LINKS

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

FORMULA

Empirical: a(n) = a(n-1) +9*a(n-3) +18*a(n-4) +14*a(n-5) +19*a(n-6) -13*a(n-7) -65*a(n-8) -40*a(n-9) +21*a(n-10) +45*a(n-11) +11*a(n-12) -36*a(n-13) -113*a(n-14) -28*a(n-15) +189*a(n-16) -151*a(n-17) -300*a(n-18) +306*a(n-19) +333*a(n-20) -73*a(n-21) +112*a(n-22) -90*a(n-23) -484*a(n-24) -221*a(n-25) -485*a(n-26) -39*a(n-27) +1517*a(n-28) +362*a(n-29) -1282*a(n-30) +71*a(n-31) +500*a(n-32) -205*a(n-33) +106*a(n-34) +105*a(n-35) -45*a(n-36) -15*a(n-37) -140*a(n-38) -42*a(n-39) -28*a(n-40) -16*a(n-41) for n>48

EXAMPLE

Some solutions for n=4

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

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

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

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

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

CROSSREFS

Cf. A261292.

Sequence in context: A252386 A289221 A345390 * A253463 A255105 A298685

Adjacent sequences:  A261287 A261288 A261289 * A261291 A261292 A261293

KEYWORD

nonn

AUTHOR

R. H. Hardin, Aug 14 2015

STATUS

approved

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Last modified May 24 17:17 EDT 2022. Contains 354042 sequences. (Running on oeis4.)