A123770 - OEIS

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A123770

Number of ways, counted up to symmetry, to build a contiguous building with n LEGO blocks of size 1x3.

1, 8, 152, 3594, 96105, 2734356, 81126946, 2480378897, 77597683206, 2472038270424 (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: A075351 A003491 A053606 * A003400 A059510 A094059` `Adjacent sequences: A123767 A123768 A123769 * A123771 A123772 A123773`
	KEYWORD	`nonn,hard`
	AUTHOR	`Soren Eilers (eilers(AT)math.ku.dk), Oct 29 2006`

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Last modified February 16 02:51 EST 2012. Contains 205860 sequences.