A222795 Number of 2Xn 0..3 arrays with exactly floor(2Xn/2) elements unequal to at least one horizontal or antidiagonal neighbor, with new values introduced in row major 0..3 order

0, 3, 4, 18, 62, 302, 1246, 6094, 26914, 134498, 609026, 3063602, 14101834, 70953566, 330924894, 1660510388, 7832513154, 39166394428, 186507266186, 929635136724, 4461584935084, 22180085525044, 107124575002552, 531493854988914

Offset

1,2

Comments

Row 2 of A222794

Links

R. H. Hardin, Table of n, a(n) for n = 1..138

Example

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

Crossrefs

Sequence in context: A197564 A222691 A254201 * A318419 A263968 A020344

Adjacent sequences: A222792 A222793 A222794 * A222796 A222797 A222798

Keyword

nonn

Author

R. H. Hardin Mar 05 2013

Status

approved