A222512 Number of 4Xn 0..1 arrays with exactly floor(4Xn/2) elements unequal to at least one horizontal, diagonal or antidiagonal neighbor, with new values introduced in row major 0..1 order

0, 11, 35, 84, 423, 1753, 8489, 39873, 200999, 988455, 5011027, 24887392, 126164927, 633230135, 3213998827, 16234077336, 82517378821, 418670560481, 2132042077379, 10852726670501, 55367063804357, 282538940546931, 1443897042955709

Offset

1,2

Comments

Row 4 of A222509

Links

R. H. Hardin, Table of n, a(n) for n = 1..82

Example

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

Crossrefs

Sequence in context: A092069 A103115 A003777 * A297539 A323691 A368743

Adjacent sequences: A222509 A222510 A222511 * A222513 A222514 A222515

Keyword

nonn

Author

R. H. Hardin Feb 23 2013

Status

approved