A226376 Number of tilings of a 12 X n rectangle using integer-sided square tiles of area > 1.

1, 0, 1, 1, 13, 4, 98, 57, 511, 499, 3722, 3845, 24823, 31696, 164781, 243930, 1134938, 1847197, 7765162, 13890389, 53540736, 102899049, 371688482, 756873240, 2587867543, 5533483651, 18092417136, 40238855115, 126887317089, 291501063966, 892138812087

Offset

0,5

Links

Alois P. Heinz, Table of n, a(n) for n = 0..1000

Example

a(5) = 4:
._._._._._.  ._._._._._.  ._._._._._.  ._._._._._.
|   |     |  |     |   |  |   |     |  |     |   |
|___|     |  |     |___|  |___|     |  |     |___|
|   |_____|  |_____|   |  |   |_____|  |_____|   |
|___|     |  |     |___|  |___|     |  |     |___|
|   |     |  |     |   |  |   |     |  |     |   |
|___|_____|  |_____|___|  |___|_____|  |_____|___|
|   |     |  |     |   |  |     |   |  |   |     |
|___|     |  |     |___|  |     |___|  |___|     |
|   |_____|  |_____|   |  |_____|   |  |   |_____|
|___|     |  |     |___|  |     |___|  |___|     |
|   |     |  |     |   |  |     |   |  |   |     |
|___|_____|  |_____|___|  |_____|___|  |___|_____|

Crossrefs

Column k=12 of A226206.

Sequence in context: A106293 A046734 A366253 * A222165 A277125 A249267

Adjacent sequences: A226373 A226374 A226375 * A226377 A226378 A226379

Keyword

nonn

Author

Alois P. Heinz, Jun 05 2013

Status

approved