A247776 - OEIS

%I #8 May 02 2022 10:03:19

%S 1,1,5,44,321,2404,14692,98831,684729,4642752,31650422,213894450,

%T 1451388234,9868405649,66968132029,454745989239,3086695784357,

%U 20954497956277,142275120134328,965860855067492,6557295186301572,44517125016379779,302224231486908372

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

%H Alois P. Heinz, <a href="/A247776/b247776.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 A247712.

%Y Cf. A174249, A233427.

%K nonn

%O 0,3

%A _Alois P. Heinz_, Sep 23 2014