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A247746 Total number of Z shapes in all tilings of a 5 X n rectangle with pentominoes of any shape. 2
0, 0, 0, 4, 52, 532, 4772, 44624, 413332, 3704668, 32312456, 277318708, 2365831332, 20023322874, 168065885292, 1401084600204, 11617827516556, 95910742322858, 788559509624036, 6459527069162538, 52742304806108492, 429408151732020490, 3487057360672870112 (list; graph; refs; listen; history; text; internal format)
OFFSET
0,4
LINKS
Wikipedia, Pentomino
FORMULA
a(n) = Sum_{k>0} k * A247713(n,k).
CROSSREFS
Sequence in context: A101354 A229146 A071953 * A221727 A144339 A155661
KEYWORD
nonn
AUTHOR
Alois P. Heinz, Sep 23 2014
STATUS
approved

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Last modified March 4 14:06 EST 2024. Contains 370532 sequences. (Running on oeis4.)