A184473 1/6 the number of (n+2)X7 0..2 arrays with each 3X3 subblock containing one of one value, four of another, and four of the last

45585, 62213, 86575, 127689, 247879, 520289, 1219455, 3727073, 11454631, 35847321, 132023695, 462435665, 1581583095, 6139850633, 22407327775, 78976349889, 312058001959, 1156657902329, 4125792115215, 16415153428433

Offset

1,1

Comments

Column 5 of A184477

Links

R. H. Hardin, Table of n, a(n) for n = 1..28

Example

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

Crossrefs

Sequence in context: A287250 A253045 A251397 * A157653 A202915 A257358

Adjacent sequences: A184470 A184471 A184472 * A184474 A184475 A184476

Keyword

nonn

Author

R. H. Hardin Jan 15 2011

Status

approved