A222775 Number of 7 X n 0..1 arrays with exactly floor(7 X n/2) elements unequal to at least one horizontal or antidiagonal neighbor, with new values introduced in row major 0..1 order.

0, 512, 7575, 196185, 2645385, 79612578, 1139211468, 36347447930, 539406313075, 17697303249138, 268539430883934, 8952558217033179, 137856342447857961, 4642930013771229936, 72224464903123955127, 2449378469060543554130

Offset

1,2

Comments

Row 7 of A222769.

Links

R. H. Hardin, Table of n, a(n) for n = 1..25

Example

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

Crossrefs

Cf. A222769.

Sequence in context: A263034 A254012 A258518 * A257419 A255749 A251186

Adjacent sequences: A222772 A222773 A222774 * A222776 A222777 A222778

Keyword

nonn

Author

R. H. Hardin Mar 05 2013

Status

approved