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.

4, 35, 34, 81, 809, 1750, 5071, 29256, 93170, 300067, 1374813, 4881352, 17156265, 70554601, 260365422, 950843894, 3740973714, 13990748422, 52014399980, 200564580212, 754390821186, 2828195071320, 10800225596334, 40733212835196

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