A263667 Number of (n+1)X(1+1) 0..6 arrays with each row and column divisible by 11, read as a base-7 number with top and left being the most significant digits.

3, 12, 57, 283, 1415, 7097, 35513, 177572, 887845, 4438957, 22194651, 110973054, 554865069, 2774325211, 13871626055, 69358131749, 346790660621, 1733953303574, 8669766516865, 43348832566369, 216744162822867, 1083720814100868

Offset

1,1

Comments

Column 1 of A263672.

Links

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

Formula

Empirical: a(n) = 5*a(n-1) +67*a(n-10) -335*a(n-11)

Example

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

Crossrefs

Cf. A263672.

Sequence in context: A106570 A027140 A110309 * A101106 A165310 A133158

Adjacent sequences: A263664 A263665 A263666 * A263668 A263669 A263670

Keyword

nonn

Author

R. H. Hardin, Oct 23 2015

Status

approved