A247196 - OEIS

A247196

Number of tilings of a 5 X n rectangle using n pentominoes of shapes T, I, P.

1, 1, 3, 7, 17, 78, 199, 638, 1865, 5332, 17250, 50877, 156787, 475348, 1423432, 4367178, 13182353, 40122074, 121916294, 369052634, 1122475534, 3403574961, 10335095973, 31385295907, 95218937465, 289154182737, 877572289140, 2663965244527, 8087517963748

(list; graph; refs; listen; history; text; internal format)

OFFSET

0,3

LINKS

Alois P. Heinz, Table of n, a(n) for n = 0..1000

Wikipedia, Pentomino

EXAMPLE

a(3) = 7:

._____. ._____. ._____. ._____. ._____. ._____. ._____.

|_. | | | | | | | | | | | | | | | | | | ._|

| |___| | | ._| | | | | | |_. | |_. | | | ._| | |___| |

| .___| | |_| | | | | | | | |_| | |_| | |_| | | |___. |