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A261708 Number of (n+2)X(5+2) 0..1 arrays with each 3X3 subblock having clockwise perimeter pattern 00000001 00000101 or 00000111. 1
628, 892, 1168, 734, 676, 1818, 984, 748, 1096, 1168, 880, 958, 2420, 1296, 1160, 2492, 2060, 1572, 1576, 3748, 2084, 1752, 3708, 2730, 2140, 2118, 4944, 2664, 2432, 5930, 3988, 3150, 2988, 6862, 3720, 3292, 7972, 5024, 4036, 3782, 8648, 4568, 4240, 11020 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 5 of A261709.

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=7

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

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

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

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

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

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

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

CROSSREFS

Cf. A261709.

Sequence in context: A188362 A098260 A224603 * A098261 A256937 A177421

Adjacent sequences:  A261705 A261706 A261707 * A261709 A261710 A261711

KEYWORD

nonn

AUTHOR

R. H. Hardin, Aug 28 2015

STATUS

approved

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Last modified March 30 10:26 EDT 2020. Contains 333125 sequences. (Running on oeis4.)