A265217 Number of (2n-1)X6 0..12n-7 arrays with upper left zero and lower right 12n-7 and each element differing from its horizontal and vertical neighbors by a power of three.

32, 30623109, 64809856589464, 830856356425163354553, 3113602909073736340307032627, 31511171120279176710346604341605166, 100252067903354679330166584087861040952007

Offset

1,1

Comments

Column 6 of A265218 (nonzero terms).

Links

Table of n, a(n) for n=1..7.

Example

Some solutions for n=1
..0..3..4..5..4..5....0..3..0..1..4..5....0..1..4..1..4..5....0..1..4..1..2..5

Crossrefs

Cf. A265218.

Sequence in context: A217027 A087927 A357566 * A368327 A377596 A224087

Adjacent sequences: A265214 A265215 A265216 * A265218 A265219 A265220

Keyword

nonn

Author

R. H. Hardin, Dec 05 2015

Status

approved