A260500 Number of (n+2)X(7+2) 0..1 arrays with each 3X3 subblock having clockwise perimeter pattern 00000001 00000011 or 00001011

3446, 4393, 11450, 22405, 30590, 67993, 155232, 238047, 464696, 1101861, 1918174, 3455378, 7911060, 15278603, 27003724, 57946329, 118720366, 215170020, 434883634, 908857723, 1710433300, 3334349545, 6924650180, 13468317384

Offset

1,1

Comments

Column 7 of A260501

Links

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

Example

Some solutions for n=4
..0..0..0..1..0..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
..1..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..0....1..1..0..0..1..0..0..1..1
..0..0..0..1..0..0..0..0..0....0..0..0..0..1..0..0..0..0
..1..0..0..1..0..1..1..0..0....1..0..0..0..0..0..0..0..0

Crossrefs

Cf. A260501

Sequence in context: A324680 A273341 A107537 * A202644 A218830 A210626

Adjacent sequences: A260497 A260498 A260499 * A260501 A260502 A260503

Keyword

nonn

Author

R. H. Hardin, Jul 27 2015

Status

approved