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A278456 Number of tilings of a 5 X n rectangle using pentominoes of any shape and monominoes. 6
1, 2, 50, 1954, 56864, 1532496, 42238426, 1178422563, 32890293494, 917103556607, 25552076570350, 711923354658732, 19838824712825618, 552851181380560869, 15406086995815163663, 429312063890812931103, 11963383230714027535776, 333377000620725693771782 (list; graph; refs; listen; history; text; internal format)
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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CROSSREFS

Column k=5 of A278657.

Cf. A174249, A233427, A273477.

Sequence in context: A221241 A246071 A088920 * A231043 A079198 A274485

Adjacent sequences:  A278453 A278454 A278455 * A278457 A278458 A278459

KEYWORD

nonn

AUTHOR

Alois P. Heinz, Nov 22 2016

STATUS

approved

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Last modified October 13 19:48 EDT 2019. Contains 327981 sequences. (Running on oeis4.)