A263335 Number of (n+2)X(2+2) 0..2 arrays with each row and column divisible by 13, read as a base-3 number with top and left being the most significant digits.

7, 19, 57, 409, 2047, 10747, 70423, 427507, 2610075, 16811257, 106973797, 685280521, 4472908837, 29110775719, 191077482297, 1268190506821, 8394627812935, 56013012538219, 376887163063705, 2528646896288971

Offset

1,1

Comments

Column 2 of A263337.

Links

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

Example

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

Crossrefs

Cf. A263337.

Sequence in context: A126361 A069005 A000413 * A155335 A155226 A229442

Adjacent sequences: A263332 A263333 A263334 * A263336 A263337 A263338

Keyword

nonn

Author

R. H. Hardin, Oct 15 2015

Status

approved