A216027 Number of horizontal, vertical and diagonal neighbor colorings of the odd squares of an nX4 array with new integer colors introduced in row major order

1, 5, 29, 371, 6150, 167130, 5219070, 233834847, 11412814314, 741757937068, 51088102234508, 4468693984145541, 407520605922011467, 45668525708806007925, 5279748839226156263229, 732043230152926700952839

Offset

1,2

Comments

Column 4 of A216031

Links

R. H. Hardin, Table of n, a(n) for n = 1..20

Example

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

Crossrefs

Sequence in context: A366411 A356486 A289483 * A087899 A202759 A103783

Adjacent sequences: A216024 A216025 A216026 * A216028 A216029 A216030

Keyword

nonn

Author

R. H. Hardin Aug 30 2012

Status

approved