A230616 Number of 4Xn 0..2 arrays x(i,j) with each element horizontally or antidiagonally next to at least one element with value (x(i,j)+1) mod 3, and upper left element zero

0, 0, 0, 348, 7072, 149664, 3023532, 61203362, 1237807846, 25032128092, 506216068952, 10237045859808, 207020237832924, 4186499352406046, 84662140166304162, 1712093427814659238, 34623078306219536074

Offset

1,4

Comments

Row 4 of A230614

Links

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

R. H. Hardin, Empirical recurrence of order 59K

Formula

Empirical recurrence of order 59 (see link above)

Example

Some solutions for n=4
..0..1..2..1....0..1..2..1....0..1..2..1....0..1..0..2....0..1..2..0
..0..0..1..2....0..0..0..2....2..0..0..1....2..0..1..0....0..0..1..0
..2..1..0..2....1..2..1..0....1..2..2..1....2..1..1..0....1..2..1..0
..1..2..1..0....0..1..2..1....1..0..2..1....0..2..1..0....0..1..2..1

Crossrefs

Sequence in context: A237724 A054467 A230705 * A223178 A264326 A230609

Adjacent sequences: A230613 A230614 A230615 * A230617 A230618 A230619

Keyword

nonn

Author

R. H. Hardin, Oct 25 2013

Status

approved