A123824 - OEIS

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A123824

Number of ways, counted up to symmetry, to build a contiguous building with n LEGO blocks of size 2x3.

1, 16, 697, 34958, 1947321, 114675898, 7026150623, 443114008903 (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: A014733 A053907 A036513 * A198283 A201622 A171736` `Adjacent sequences: A123821 A123822 A123823 * A123825 A123826 A123827`
	KEYWORD	`nonn,hard`
	AUTHOR	`Soren Eilers (eilers(AT)math.ku.dk), Oct 29 2006`

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Last modified February 14 23:53 EST 2012. Contains 205689 sequences.