A322499 Number of tilings of a 6 X n rectangle using V (2m+1)-ominoes (m >= 0) in standard orientation.

1, 1, 13, 107, 838, 6523, 51420, 396500, 3086898, 24009733, 186735416, 1452320952, 11295996925, 87852065113, 683271518863, 5314139902766, 41330688551925, 321449136734050, 2500069029481412, 19444268928224485, 151227677898412290, 1176172285095334802

Offset

0,3

Comments

The shapes of the tiles are:

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._. | |

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

|_| |___| |_____| |_______| ... .

Links

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

Wikipedia, Polyomino

Crossrefs

Column k=6 of A322494.

Sequence in context: A132261 A142364 A164301 * A087305 A168117 A244176

Adjacent sequences: A322496 A322497 A322498 * A322500 A322501 A322502

Keyword

nonn,easy

Author

Alois P. Heinz, Dec 12 2018

Status

approved