A278878 - OEIS

%I #9 Feb 06 2017 12:43:44

%S 1,4,508,76003,9616962,1178422563,147382229321,18446349150367,

%T 2306845502243104,288660593026069762,36110872742261362007,

%U 4516714276347536995415,564976767651757484324113,70671912291059592748455901,8840222401663200361818980813

%N Number of tilings of a 7 X n rectangle using pentominoes of any shape and monominoes.

%H Wikipedia, <a href="https://en.wikipedia.org/wiki/Pentomino">Pentomino</a>

%e a(1) = 4:

%e ._.   ._.   ._.   ._.

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%e |_|   |_|   |_|   |_|  .

%Y Column k=7 of A278657.

%K nonn

%O 0,2

%A _Alois P. Heinz_, Nov 29 2016