A322500 Number of tilings of a 7 X n rectangle using V (2m+1)-ominoes (m >= 0) in standard orientation.

1, 1, 21, 257, 2989, 34468, 396500, 4577274, 52338705, 600923375, 6897569624, 79170705722, 908721438900, 10430285080567, 119719520002653, 1374133015203548, 15772280213569812, 181033948036338279, 2077904397828614231, 23850149155575310594, 273751580233289217307

Offset: 0

Author

Alois P. Heinz, Dec 12 2018

Keywords

• nonn

Comments

The shapes of the tiles are:

._.

._. | |

._. | | | |

.. | |. | |.. | |.._.

|| |__| |___| |_____| ... .

Links

• Alois P. Heinz, Table of n, a(n) for n = 0..944
• Wikipedia, Polyomino

Crossrefs

Column k=7 of A322494.