A123838 - OEIS

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A123838

Number of ways, counted up to symmetry, to build a contiguous building with n LEGO blocks of size 4 X 4.

1, 13, 869, 69479, 6131125, 571764366, 55449596876 (list; graph; refs; listen; history; internal format)

	OFFSET	`1,2`
	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: A060825 A182932 A189446 * A013539 A201255 A196695` `Adjacent sequences: A123835 A123836 A123837 * A123839 A123840 A123841`
	KEYWORD	`nonn,hard`
	AUTHOR	`Soren Eilers (eilers(AT)math.ku.dk), Oct 29 2006`

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Last modified February 16 19:48 EST 2012. Contains 205955 sequences.