A260467 Number of (n+2)X(n+2) 0..1 arrays with each 3X3 subblock having clockwise perimeter pattern 00000000 00000001 or 00010101.

34, 92, 658, 5034, 57524, 1095328, 24138984, 741446708, 35549850396, 2210679193297, 185698612792568, 22953437585181163, 3891199671596923784, 894945430246534184300, 292131961025408714854594

Offset

1,1

Comments

Diagonal of A260475

Links

R. H. Hardin, Table of n, a(n) for n = 1..17

Example

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

Crossrefs

Cf. A260475

Sequence in context: A183311 A282811 A185460 * A202421 A365248 A202414

Adjacent sequences: A260464 A260465 A260466 * A260468 A260469 A260470

Keyword

nonn

Author

R. H. Hardin, Jul 26 2015

Status

approved