A265213 Number of (2n-1)X2 0..4n-3 arrays with upper left zero and lower right 4n-3 and each element differing from its horizontal and vertical neighbors by a power of three.

1, 16, 1958, 654833, 112227310, 32488774453, 7717657825137, 4728240318574186, 2979856311196634505, 2024001459953859821039, 1213770752826839089178744, 689849091376425076726628410, 380422604546957185646459036805

Offset

1,2

Comments

Column 2 of A265218 (nonzero terms).

Links

R. H. Hardin, Table of n, a(n) for n = 1..105

Example

Some solutions for n=3
..0..1....0..1....0..9....0..3....0..3....0..1....0..9....0..9....0..3....0..9
..1..2....1..0....3..6....1..4....9..0....1..2....3..6....3..6....3..0....9..0
..0..3....0..9....0..9....0..1....0..3....2..3....6..9....6..3....4..3....6..3
..9..0....9..8....9..0....9..0....1..0....3..6....5..6....7..6....3..0....9..6
..8..9....6..9....8..9....8..9....0..9....0..9....8..9....8..9....0..9....0..9

Crossrefs

Cf. A265218.

Sequence in context: A160306 A167000 A075413 * A176886 A159389 A291828

Adjacent sequences: A265210 A265211 A265212 * A265214 A265215 A265216

Keyword

nonn

Author

R. H. Hardin, Dec 05 2015

Status

approved