A259289 Number of (n+1)X(n+1) 0..1 arrays with each 2X2 subblock having clockwise pattern 0001 0101 or 0111

10, 94, 1460, 43870, 2293928, 224879224, 39630793526, 12907069546270, 7658473109336548, 8358931948086081568, 16708747158923511120478, 61372969404995540219424992, 413745383754977580838956886918

Offset

1,1

Comments

Diagonal of A259297

Links

Table of n, a(n) for n=1..13.

Example

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

Crossrefs

Cf. A259297

Sequence in context: A125422 A190988 A287830 * A163738 A190987 A233738

Adjacent sequences: A259286 A259287 A259288 * A259290 A259291 A259292

Keyword

nonn

Author

R. H. Hardin, Jun 23 2015

Status

approved