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A247768 Number of tilings of a 5 X n rectangle using pentominoes of any but the L shape. 2
1, 1, 3, 36, 177, 1300, 8866, 54849, 372943, 2466986, 16335736, 108823634, 719573862, 4776148981, 31691581679, 210171600724, 1394511598079, 9249464911748, 61356588838016, 407022840274446, 2699962045755658, 17910503042677994, 118809774179725990 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,3

LINKS

Alois P. Heinz, Table of n, a(n) for n = 0..500

Wikipedia, Pentomino

FORMULA

a(n) ~ c * d^n, where d = 6.63354739064799173452910396285896274912377276863088340465087347768..., c = 0.09918446577271493875329249874198830860996222825871620867051185835... . - Vaclav Kotesovec, Mar 05 2016

CROSSREFS

Column k=0 of A247704.

Cf. A174249, A233427.

Sequence in context: A213848 A006428 A068619 * A168075 A275085 A188891

Adjacent sequences:  A247765 A247766 A247767 * A247769 A247770 A247771

KEYWORD

nonn

AUTHOR

Alois P. Heinz, Sep 23 2014

STATUS

approved

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Last modified June 29 03:09 EDT 2017. Contains 288858 sequences.