A268027 Number of 3Xn 0..2 arrays with every repeated value in every row greater than or equal to, and in every column greater than, the previous repeated value.

24, 576, 13824, 295962, 6042732, 117582228, 2205234900, 40088968398, 709841497188, 12287419441812, 208546228493724, 3478737714576768, 57143989099923852, 925889151644801202, 14817867358400405148

Offset

1,1

Comments

Row 3 of A268026.

Links

R. H. Hardin, Table of n, a(n) for n = 1..210

R. H. Hardin, Empirical recurrence of order 86

Formula

Empirical recurrence of order 86 (see link above)

Example

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

Crossrefs

Cf. A268026.

Sequence in context: A267962 A188870 A171298 * A009968 A041265 A042106

Adjacent sequences: A268024 A268025 A268026 * A268028 A268029 A268030

Keyword

nonn

Author

R. H. Hardin, Jan 24 2016

Status

approved