A186535 Number of (n+1) X 9 0..2 arrays with no 2 X 2 subblock determinant equal to any horizontal or vertical neighbor 2 X 2 subblock determinant.

73494218, 110986523654, 192072734086538, 330651060182605074, 561052248760733641430

Offset

1,1

Comments

Column 8 of A186536.

Links

Table of n, a(n) for n=1..5.

Example

Some solutions for 3 X 9
..0..1..0..1..0..2..2..0..1....0..1..0..1..0..2..2..2..0
..1..0..1..0..1..1..2..2..2....1..0..1..0..2..0..2..0..1
..0..1..0..1..0..2..2..0..1....0..1..0..1..0..2..1..1..1

Crossrefs

Cf. A186536.

Sequence in context: A138058 A022228 A032431 * A244924 A210319 A295479

Adjacent sequences: A186532 A186533 A186534 * A186536 A186537 A186538

Keyword

nonn

Author

R. H. Hardin Feb 23 2011

Status

approved