login
The OEIS is supported by the many generous donors to the OEIS Foundation.

 

Logo
Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A247103 Number of tilings of a 5 X n rectangle using n pentominoes of shapes I, N, P, U, T. 3
1, 1, 3, 11, 33, 166, 589, 2216, 8935, 33984, 137056, 539085, 2100341, 8324716, 32607928, 128652672, 507032667, 1992083368, 7853132654, 30894420646, 121642017784, 479048967517, 1885229164497, 7423732617043, 29223734864421, 115048209160729, 452968829090506 (list; graph; refs; listen; history; text; internal format)
OFFSET
0,3
LINKS
Wikipedia, Pentomino
EXAMPLE
a(3) = 11:
._____. ._____. ._____. ._____.
| | | | | | | | | | |_. |
| | | | | ._| | | | ._| | |___|
| | | | |_| ._| | |_| | | .___|
| | | | | |_| | | | | |_| |
|_|_|_| (1) |_____| (4) |_|___| (4) |_____| (2) .
CROSSREFS
Sequence in context: A032199 A018413 A004662 * A036542 A084266 A357592
KEYWORD
nonn
AUTHOR
Alois P. Heinz, Nov 20 2014
STATUS
approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recents
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified March 18 22:56 EDT 2024. Contains 370952 sequences. (Running on oeis4.)