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A247777 Number of tilings of a 5 X n rectangle using pentominoes of any but the Z shape. 2

%I

%S 1,1,5,52,451,3498,23502,173611,1323447,9920654,73573634,545170514,

%T 4060213800,30266880736,225316532881,1676398961171,12475867876511,

%U 92870049802057,691310371544378,5145544200921776,38298595223058076,285066094324142481,2121840794371117780

%N Number of tilings of a 5 X n rectangle using pentominoes of any but the Z shape.

%H Alois P. Heinz, <a href="/A247777/b247777.txt">Table of n, a(n) for n = 0..500</a>

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

%Y Column k=0 of A247713.

%Y Cf. A174249, A233427.

%K nonn

%O 0,3

%A _Alois P. Heinz_, Sep 23 2014

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Last modified April 19 12:35 EDT 2021. Contains 343114 sequences. (Running on oeis4.)