A261552 - OEIS

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A261552

Number of (n+2)X(5+2) 0..1 arrays with each 3X3 subblock having clockwise perimeter pattern 00000001 00000101 or 00001011.

652, 871, 1210, 816, 656, 1273, 1084, 855, 1036, 1259, 906, 967, 1868, 1421, 1174, 1872, 2062, 1490, 1414, 2701, 2106, 1737, 2594, 2660, 1956, 1979, 3720, 2663, 2258, 3851, 3776, 2770, 2630, 4948, 3568, 3023, 4994, 4687, 3466, 3399, 6362, 4345, 3746

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,1

COMMENTS

Column 5 of A261553.

LINKS

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

FORMULA

Empirical: a(n) = 2*a(n-7) -2*a(n-21) +a(n-28) for n>34

EXAMPLE

Some solutions for n=4

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

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

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

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

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

CROSSREFS

Cf. A261553.

Sequence in context: A257715 A048915 A257827 * A002232 A127029 A127030

Adjacent sequences: A261549 A261550 A261551 * A261553 A261554 A261555

KEYWORD

nonn

AUTHOR

R. H. Hardin, Aug 24 2015

STATUS

approved