A261708 Number of (n+2)X(5+2) 0..1 arrays with each 3X3 subblock having clockwise perimeter pattern 00000001 00000101 or 00000111.

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

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: A224603 A345536 A345788 * A098261 A256937 A177421

Adjacent sequences: A261705 A261706 A261707 * A261709 A261710 A261711

Keyword

nonn

Author

R. H. Hardin, Aug 28 2015

Status

approved