OFFSET
1,3
COMMENTS
LINKS
Paul Tek, Table of n, a(n) for n = 1..1000
Paul Tek, Illustration of the first terms
Paul Tek, PERL program for this sequence
EXAMPLE
A 4 x 1 rectangle can be tiled in 5 ways:
+-+-+-+-+ +-+ +-+ +-+ +-+
- | | | | | that is the concatenation of | |, | |, | | and | |
+-+-+-+-+ +-+ +-+ +-+ +-+,
+---+-+-+ +---+ +-+-+
- | | | | that is the concatenation of | | and | | |
+---+-+-+ +---+ +-+-+,
+-+---+-+
- | | | | that is not the concatenation of smaller equally sized tilings,
+-+---+-+
+-+-+---+ +-+-+ +---+
- | | | | that is the concatenation of | | | and | |
+-+-+---+ +-+-+ +---+,
+---+---+ +---+ +---+
- | | | that is the concatenation of | | and | |
+---+---+ +---+ +---+.
Hence a(4)=1.
CROSSREFS
KEYWORD
nonn
AUTHOR
Paul Tek, May 04 2013
STATUS
approved