A260098 Number of (n+2)X(n+2) 0..1 arrays with each 3X3 subblock having clockwise perimeter pattern 00000001 00000101 or 00010101

48, 201, 1136, 7119, 47576, 355098, 2703084, 23254546, 207675396, 2011569856, 20907484556, 232901842600, 2783676334932, 35816209079553

Offset

1,1

Comments

Diagonal of A260106

Links

Table of n, a(n) for n=1..14.

Example

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

Crossrefs

Cf. A260106

Sequence in context: A275507 A072254 A290350 * A260286 A183683 A260240

Adjacent sequences: A260095 A260096 A260097 * A260099 A260100 A260101

Keyword

nonn

Author

R. H. Hardin, Jul 16 2015

Status

approved