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A247738 Total number of N shapes in all tilings of a 5 X n rectangle with pentominoes of any shape. 2
0, 0, 0, 8, 88, 1024, 10388, 99840, 935900, 8415368, 74295280, 645535244, 5545784444, 47152918764, 397457338488, 3327197881716, 27688757985292, 229256300558340, 1889667799688076, 15514699106805468, 126939424800685264, 1035396864840877088, 8421920979218715332 (list; graph; refs; listen; history; text; internal format)
OFFSET
0,4
LINKS
Wikipedia, Pentomino
FORMULA
a(n) = Sum_{k>0} k * A247705(n,k).
CROSSREFS
Sequence in context: A112907 A053380 A250166 * A115864 A036917 A003497
KEYWORD
nonn
AUTHOR
Alois P. Heinz, Sep 23 2014
STATUS
approved

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Last modified April 17 08:00 EDT 2024. Contains 371756 sequences. (Running on oeis4.)