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A278878
Number of tilings of a 7 X n rectangle using pentominoes of any shape and monominoes.
1
1, 4, 508, 76003, 9616962, 1178422563, 147382229321, 18446349150367, 2306845502243104, 288660593026069762, 36110872742261362007, 4516714276347536995415, 564976767651757484324113, 70671912291059592748455901, 8840222401663200361818980813
OFFSET
0,2
EXAMPLE
a(1) = 4:
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CROSSREFS
Column k=7 of A278657.
Sequence in context: A022919 A253904 A268468 * A348703 A291830 A368370
KEYWORD
nonn
AUTHOR
Alois P. Heinz, Nov 29 2016
STATUS
approved