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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. 1
24, 576, 13824, 295962, 6042732, 117582228, 2205234900, 40088968398, 709841497188, 12287419441812, 208546228493724, 3478737714576768, 57143989099923852, 925889151644801202, 14817867358400405148 (list; graph; refs; listen; history; text; internal format)
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

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Last modified October 19 11:02 EDT 2021. Contains 348079 sequences. (Running on oeis4.)