A184453 1/36 the number of (n+2)X7 0..2 arrays with each 3X3 subblock containing two of one value, two of another, and five of the last

12879, 16029, 20706, 28668, 53350, 116832, 309042, 1119528, 4313386, 16945248, 77250850, 344875848, 1476839034, 7104621264, 33006043666, 145119799128, 712190401450, 3363736243872, 14962903947522

Offset

1,1

Comments

Column 5 of A184457

Links

Table of n, a(n) for n=1..19.

Example

Some solutions with a(1,1)=0 for 4X7
..0..2..1..2..0..0..1....0..1..0..2..1..0..2....0..1..2..2..0..1..1
..0..2..1..2..2..1..1....0..1..0..2..2..2..2....0..0..0..2..2..0..1
..0..0..0..2..2..1..1....0..2..2..2..1..0..2....0..2..1..2..1..2..1
..0..2..1..2..0..0..1....0..0..1..2..0..1..2....0..1..2..2..0..1..1

Crossrefs

Sequence in context: A244171 A245793 A251922 * A233936 A360836 A158918

Adjacent sequences: A184450 A184451 A184452 * A184454 A184455 A184456

Keyword

nonn

Author

R. H. Hardin Jan 14 2011

Status

approved