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A266063 Number of nX3 integer arrays with each element equal to the number of horizontal, vertical, diagonal and antidiagonal neighbors exactly one smaller than itself. 1
4, 35, 34, 81, 809, 1750, 5071, 29256, 93170, 300067, 1374813, 4881352, 17156265, 70554601, 260365422, 950843894, 3740973714, 13990748422, 52014399980, 200564580212, 754390821186, 2828195071320, 10800225596334, 40733212835196 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 3 of A266067.

LINKS

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

R. H. Hardin, Empirical recurrence of order 78

FORMULA

Empirical recurrence of order 78 (see link above)

EXAMPLE

Some solutions for n=4

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

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

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

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

CROSSREFS

Cf. A266067.

Sequence in context: A334257 A193994 A097382 * A282284 A003349 A344642

Adjacent sequences:  A266060 A266061 A266062 * A266064 A266065 A266066

KEYWORD

nonn

AUTHOR

R. H. Hardin, Dec 20 2015

STATUS

approved

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Last modified December 7 07:01 EST 2021. Contains 349567 sequences. (Running on oeis4.)