A260000 Number of (n+2)X(7+2) 0..1 arrays with each 3X3 subblock having clockwise perimeter pattern 00000001 00000011 or 00000101

7284, 32525, 112570, 197804, 450718, 1890678, 4405472, 8894577, 30259110, 85219828, 189364182, 533978795, 1526717742, 3840271170, 10224583070, 27687815294, 72927251426, 197908151664, 519999108640, 1358896817375

Offset

1,1

Comments

Column 7 of A260001

Links

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

Example

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

Crossrefs

Cf. A260001

Sequence in context: A084276 A152502 A251226 * A303876 A358855 A031799

Adjacent sequences: A259997 A259998 A259999 * A260001 A260002 A260003

Keyword

nonn

Author

R. H. Hardin, Jul 12 2015

Status

approved