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A266057 Number of 3Xn integer arrays with each element equal to the number of horizontal and antidiagonal neighbors less than or equal to itself. 1
1, 35, 20, 302, 10310, 127492, 1590691, 20375630, 280811810, 3864301448, 50179179330, 655917215158, 8775960264661, 116907223558842, 1546866861474179, 20490542758690403, 271954342187521110, 3609318415540677192 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Row 3 of A266055.

LINKS

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

R. H. Hardin, Empirical recurrence of order 94

FORMULA

Empirical recurrence of order 94 (see link above)

EXAMPLE

Some solutions for n=4

..0..3..0..2....1..0..3..0....1..0..2..0....0..3..1..1....1..0..1..2

..0..4..1..0....2..0..4..1....1..4..2..2....0..4..4..0....1..4..0..2

..0..3..2..0....1..2..0..1....0..3..0..1....1..1..3..0....0..3..1..1

CROSSREFS

Cf. A266055.

Sequence in context: A033355 A267402 A217408 * A267341 A174027 A259083

Adjacent sequences:  A266054 A266055 A266056 * A266058 A266059 A266060

KEYWORD

nonn

AUTHOR

R. H. Hardin, Dec 20 2015

STATUS

approved

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Last modified January 17 22:33 EST 2022. Contains 350410 sequences. (Running on oeis4.)