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A259957 Number of (n+2)X(3+2) 0..1 arrays with each 3X3 subblock having clockwise perimeter pattern 00000000 00000001 or 00001001 1
155, 439, 1603, 5449, 18681, 64891, 222813, 764865, 2637815, 9090487, 31281933, 107674395, 370788133, 1276814309, 4396089911, 15135449051, 52112945503, 179433951141, 617811988681, 2127175449173, 7324071255063, 25217614284475 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 3 of A259962

LINKS

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

FORMULA

Empirical: a(n) = a(n-1) +a(n-2) +12*a(n-3) +32*a(n-4) +44*a(n-5) +37*a(n-6) -32*a(n-7) -81*a(n-8) -12*a(n-9) +47*a(n-10) +38*a(n-11) +8*a(n-12) -6*a(n-13) -4*a(n-14) -4*a(n-15) for n>16

EXAMPLE

Some solutions for n=4

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

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

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

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

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

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

CROSSREFS

Cf. A259962

Sequence in context: A119609 A063340 A105986 * A129640 A028382 A250936

Adjacent sequences:  A259954 A259955 A259956 * A259958 A259959 A259960

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jul 10 2015

STATUS

approved

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Last modified June 24 22:23 EDT 2021. Contains 345445 sequences. (Running on oeis4.)