A222796 Number of 3Xn 0..3 arrays with exactly floor(3Xn/2) elements unequal to at least one horizontal or antidiagonal neighbor, with new values introduced in row major 0..3 order

0, 8, 34, 275, 888, 14292, 62072, 1144030, 5213239, 98670352, 454254970, 8668405392, 40062023836, 768672153916, 3564115006844, 68657814382115, 319237701630821, 6169004369711478, 28754090389217238, 557059581178953846

Offset

1,2

Comments

Row 3 of A222794

Links

R. H. Hardin, Table of n, a(n) for n = 1..58

Example

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

Crossrefs

Sequence in context: A252934 A229398 A223015 * A203445 A318244 A280395

Adjacent sequences: A222793 A222794 A222795 * A222797 A222798 A222799

Keyword

nonn

Author

R. H. Hardin Mar 05 2013

Status

approved