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

%I #8 May 02 2022 10:02:16

%S 1,1,5,39,369,2908,19185,137200,1022915,7606043,55699672,405617356,

%T 2969215193,21791407596,159806458014,1170659384512,8574740528977,

%U 62830753812692,460445907547463,3374031670320652,24722398637797408,181148733466258107,1327366881461315358

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

%H Alois P. Heinz, <a href="/A247772/b247772.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 A247708.

%Y Cf. A174249, A233427.

%K nonn

%O 0,3

%A _Alois P. Heinz_, Sep 23 2014