A232409 Number of (n+1) X (3+1) 0..2 arrays with every element both >= and <= some horizontal, diagonal or antidiagonal neighbor.

973, 44971, 2189991, 107913855, 5322933313, 262249675165, 12924602609687, 636974571589143, 31392224093121163, 1547115367969767881, 76247135423218512743, 3757719192867286695513, 185193231246257132276941

Offset

1,1

Comments

Column 3 of A232414.

Links

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

R. H. Hardin, Empirical recurrence of order 64

Formula

Empirical recurrence of order 64 (see link above).

Example

Some solutions for n=2
..1..2..1..1....1..2..1..2....2..0..2..0....1..1..2..2....1..1..2..1
..1..1..2..1....2..1..2..1....2..2..0..2....1..0..1..2....2..2..0..2
..2..2..0..0....1..1..1..1....2..1..1..0....0..1..0..1....2..2..0..0

Crossrefs

Cf. A232414.

Sequence in context: A203030 A209045 A209017 * A275060 A251837 A251838

Adjacent sequences: A232406 A232407 A232408 * A232410 A232411 A232412

Keyword

nonn

Author

R. H. Hardin, Nov 23 2013

Status

approved