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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
OFFSET
1,1
COMMENTS
Column 3 of A266067.
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
KEYWORD
nonn
AUTHOR
R. H. Hardin, Dec 20 2015
STATUS
approved