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A264812
Number of tilings of a 5 X n rectangle using n pentominoes of shapes P, I, X.
6
1, 1, 3, 5, 13, 52, 123, 366, 909, 2444, 7108, 19157, 53957, 146826, 400704, 1115852, 3059907, 8475420, 23369304, 64225984, 177572352, 488839323, 1349102071, 3722419367, 10255126169, 28303059509, 78013005366, 215160477217, 593488173404, 1636220978049
(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(4) = 13:
._______. ._______. ._______. ._______.
| | | | | | | | | | | | | ._| |
| | | | | | ._| ._| | ._| | | |___| |
| | | | | |_| |_| | |_| | | | | |___|
| | | | | (1) | | | (4) | | | | (6) | ._| | (2)
|_|_|_|_| |___|___| |_ _|_|_| |_|_____| .
a(5) = 52:
._________.
| |_. |
| ._| |___|
|_|_ _| |
| |_| | (2) ...
|_____|___| .
CROSSREFS
Cf. A174249, A233427, A234312, A234931, A247124, A247268, A247443, A249762, A264765, A278330.
Sequence in context: A209002 A106879 A249762 * A276827 A034375 A081953
Adjacent sequences: A264809 A264810 A264811 * A264813 A264814 A264815
KEYWORD
nonn
AUTHOR
Alois P. Heinz, Nov 25 2015
STATUS
approved

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Last modified September 28 13:00 EDT 2024. Contains 376297 sequences.
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