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A260065 Number of (n+2)X(3+2) 0..1 arrays with each 3X3 subblock having clockwise perimeter pattern 00000001 00000011 or 00000111 1
256, 594, 1680, 3825, 6714, 16344, 42094, 84761, 173654, 438404, 996340, 2016015, 4598146, 11017398, 23615180, 50616069, 118597002, 268738044, 575235736, 1289517999, 2973476636, 6546511470, 14328637582, 32602124265, 73467292150 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 3 of A260070

LINKS

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

FORMULA

Empirical: a(n) = 7*a(n-3) +15*a(n-4) -8*a(n-6) -29*a(n-7) -36*a(n-8) -3*a(n-9) -10*a(n-10) +4*a(n-11) +26*a(n-12) -23*a(n-13) -12*a(n-14) -28*a(n-15) -8*a(n-17) for n>21

EXAMPLE

Some solutions for n=4

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

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

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

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

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

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

CROSSREFS

Cf. A260070

Sequence in context: A110297 A134608 A134609 * A329488 A086061 A235092

Adjacent sequences: A260062 A260063 A260064 * A260066 A260067 A260068

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jul 14 2015

STATUS

approved

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Last modified December 2 13:44 EST 2022. Contains 358510 sequences. (Running on oeis4.)