A278456 Number of tilings of a 5 X n rectangle using pentominoes of any shape and monominoes.

1, 2, 50, 1954, 56864, 1532496, 42238426, 1178422563, 32890293494, 917103556607, 25552076570350, 711923354658732, 19838824712825618, 552851181380560869, 15406086995815163663, 429312063890812931103, 11963383230714027535776, 333377000620725693771782

Offset

0,2

Links

Alois P. Heinz, Table of n, a(n) for n = 0..692

Wikipedia, Pentomino

Example

a(1) = 2:
._.   ._.
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|_|   | |
|_|   | |
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|_|   |_|  .

Crossrefs

Column k=5 of A278657.

Cf. A174249, A233427, A273477.

Sequence in context: A246071 A367777 A088920 * A231043 A356611 A079198

Adjacent sequences: A278453 A278454 A278455 * A278457 A278458 A278459

Keyword

nonn

Author

Alois P. Heinz, Nov 22 2016

Status

approved