A259242 Number of (n+1)X(n+1) 0..1 arrays with each 2X2 subblock having clockwise pattern 0000 0011 or 0111

9, 65, 720, 14425, 451481, 25462352, 2259371001, 359730429763, 90571705672192, 40745743533702439, 29115984372311031043, 37023356202692415717856, 75090733417483065667600023, 269938147719275944289836747059

Offset

1,1

Comments

Diagonal of A259250

Links

R. H. Hardin, Table of n, a(n) for n = 1..15

Example

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

Crossrefs

Cf. A259250

Sequence in context: A103459 A339688 A100311 * A120286 A152581 A122733

Adjacent sequences: A259239 A259240 A259241 * A259243 A259244 A259245

Keyword

nonn

Author

R. H. Hardin, Jun 22 2015

Status

approved