id:A123762 - OEIS Search Results

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Number of ways, counted up to symmetry, to build a contiguous building with n LEGO blocks of size 1x2.

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1, 4, 37, 375, 4493, 56848, 753536, 10283622, 143607345, 2041497919, 29446248496, 429858432108 (list; graph; listen)

	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	`Cf. A007576, A082679.` `Sequence in context: A025542 A162649 A133462 this_sequence A070768 A121080 A001518` `Adjacent sequences: A123759 A123760 A123761 this_sequence A123763 A123764 A123765`
	KEYWORD	`nonn,hard`
	AUTHOR	`Soren Eilers (eilers(AT)math.ku.dk), Oct 29 2006`

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Last modified December 17 23:40 EST 2009. Contains 171025 sequences.