A222496 Number of nX4 0..3 arrays with exactly floor(nX4/2) elements unequal to at least one horizontal, diagonal or antidiagonal neighbor, with new values introduced in row major 0..3 order

3, 5, 35, 346, 6109, 101272, 1809959, 30640551, 555968545, 9536953884, 171781998471, 2977558169088, 53361664849461, 931771478255831, 16637749408151073, 292170585442978004, 5204023925091257477

Offset

1,1

Comments

Column 4 of A222500

Links

R. H. Hardin, Table of n, a(n) for n = 1..81

Example

Some solutions for n=4
..0..0..0..0....0..0..0..0....0..0..0..1....0..1..2..2....0..1..0..2
..0..0..0..0....0..0..0..0....0..0..0..2....1..1..1..3....0..0..0..2
..0..0..0..0....0..0..0..1....0..0..0..0....1..1..1..1....0..0..0..0
..1..2..1..2....1..0..1..2....2..0..0..0....1..1..1..1....0..0..0..0

Crossrefs

Sequence in context: A077784 A325582 A145640 * A086158 A158878 A337858

Adjacent sequences: A222493 A222494 A222495 * A222497 A222498 A222499

Keyword

nonn

Author

R. H. Hardin Feb 23 2013

Status

approved