A259420 Number of (n+1)X(n+1) 0..1 arrays with each 2X2 subblock having clockwise pattern 0000 0001 0011 or 0111

13, 243, 12953, 1990133, 873754597, 1101527291223, 3975872829274865, 41147590225188806309, 1220087829652769318601383, 103689338398592714772850061461, 25251868912730969096083539641411367

Offset

1,1

Comments

Diagonal of A259427

Links

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

Example

Some solutions for n=3
..1..1..1..1....0..0..0..0....0..0..1..1....0..0..1..1....1..1..1..0
..0..0..0..0....1..0..0..1....0..0..0..0....0..0..1..0....1..0..1..0
..0..0..1..0....0..0..1..1....1..1..1..0....0..0..1..1....1..0..1..1
..1..1..1..1....0..0..0..1....1..0..1..0....1..0..0..0....1..1..1..0

Crossrefs

Cf. A259427

Sequence in context: A157969 A218229 A020520 * A203156 A049665 A196665

Adjacent sequences: A259417 A259418 A259419 * A259421 A259422 A259423

Keyword

nonn

Author

R. H. Hardin, Jun 26 2015

Status

approved