A183591 1/24 the number of (n+1)X7 0..3 arrays with every 2X2 subblock containing exactly three distinct values

417152, 293504588, 202888369698, 140620157014391, 97427089099770040, 67504953898839080670, 46772256761288023913418, 32407200636226196823851489, 22454047915281010754446960190, 15557785658305920745251142731306

Offset

1,1

Comments

Column 6 of A183594

Links

R. H. Hardin, Table of n, a(n) for n = 1..15

Example

Some solutions with a(1,1)=0 for 3X7
..0..0..0..0..1..0..0....0..0..0..0..1..0..1....0..0..0..0..1..0..1
..1..2..1..3..1..2..1....1..2..1..3..0..2..0....1..2..1..3..0..3..3
..0..0..0..0..0..2..3....0..0..0..1..0..1..1....0..0..0..1..0..1..2

Crossrefs

Sequence in context: A152869 A251960 A234663 * A184770 A236909 A104920

Adjacent sequences: A183588 A183589 A183590 * A183592 A183593 A183594

Keyword

nonn

Author

R. H. Hardin Jan 05 2011

Status

approved