A222680 Number of 2Xn 0..3 arrays with no more than floor(2Xn/2) elements unequal to at least one horizontal, diagonal or antidiagonal neighbor, with new values introduced in row major 0..3 order

2, 1, 5, 10, 25, 150, 359, 2249, 6511, 39991, 119033, 747758, 2254819, 14115927, 43486517, 268330409, 844434635, 5129191736, 16468845241, 98454511005, 322307191185, 1896450581728, 6325288982445, 36644084370361, 124416281370753

Offset

1,1

Comments

Row 2 of A222679

Links

R. H. Hardin, Table of n, a(n) for n = 1..45

Example

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

Crossrefs

Sequence in context: A226311 A049948 A222574 * A110352 A107310 A277279

Adjacent sequences: A222677 A222678 A222679 * A222681 A222682 A222683

Keyword

nonn

Author

R. H. Hardin Feb 28 2013

Status

approved