id:A123846 - OEIS Search Results

Search: id:A123846

Displaying 1-1 of 1 results found.

page 1

Number of ways, counted up to symmetry, to build a contiguous building with n LEGO blocks of size 5x5 which is symmetric after a rotation by 90 degrees.

+0
1

1, 1, 1, 1, 21, 31, 41, 421, 1937 (list; graph; listen)

	OFFSET	`1,5`
	REFERENCES	`M. Abrahamsen and S. Eilers, Efficient counting of LEGO buildings, in preparation` `B. Durhuus and S. Eilers, On the entropy of LEGO, arXiv:math.CO/0504039`
	LINKS	`S. Eilers, LEGO counts`
	CROSSREFS	`Sequence in context: A079394 A112375 A067599 this_sequence A031889 A034101 A034111` `Adjacent sequences: A123843 A123844 A123845 this_sequence A123847 A123848 A123849`
	KEYWORD	`nonn`
	AUTHOR	`Soren Eilers (eilers(AT)math.ku.dk), Oct 29 2006`

page 1

Search completed in 0.002 seconds

Last modified July 25 07:41 EDT 2008. Contains 142293 sequences.

AT&T Labs Research