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A247771 Number of tilings of a 5 X n rectangle using pentominoes of any but the T shape. 2
1, 1, 5, 50, 437, 3270, 21720, 160593, 1209537, 8999307, 66054288, 485082083, 3583263174, 26469863097, 195317239597, 1440271919247, 10624063817149, 78389991175482, 578363501074881, 4266856868607953, 31478045125433448, 232231064765922254, 1713315860292710073 (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

CROSSREFS

Column k=0 of A247707.

Cf. A174249, A233427.

Sequence in context: A060347 A133646 A043032 * A125962 A266028 A228751

Adjacent sequences:  A247768 A247769 A247770 * A247772 A247773 A247774

KEYWORD

nonn

AUTHOR

Alois P. Heinz, Sep 23 2014

STATUS

approved

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Last modified February 25 08:33 EST 2021. Contains 341606 sequences. (Running on oeis4.)