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A322499 Number of tilings of a 6 X n rectangle using V (2m+1)-ominoes (m >= 0) in standard orientation. 2
1, 1, 13, 107, 838, 6523, 51420, 396500, 3086898, 24009733, 186735416, 1452320952, 11295996925, 87852065113, 683271518863, 5314139902766, 41330688551925, 321449136734050, 2500069029481412, 19444268928224485, 151227677898412290, 1176172285095334802 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,3

COMMENTS

The shapes of the tiles are:

                       ._.

              ._.      | |

       ._.    | |      | |

  ._.  | |_.  | |_._.  | |_._._.

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

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

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Last modified August 9 13:39 EDT 2020. Contains 336323 sequences. (Running on oeis4.)