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; text; internal format)

	OFFSET	`1,2`
	LINKS	`Table of n, a(n) for n=1..8.`
	CROSSREFS	`Cf. A112389, A123762 - A123827, A123829 - A123849.` `Sequence in context: A053907 A222139 A036513 * A198283 A201622 A220809` `Adjacent sequences: A123821 A123822 A123823 * A123825 A123826 A123827`
	KEYWORD	`nonn,hard`
	AUTHOR	`Soren Eilers (eilers(AT)math.ku.dk), Oct 29 2006`
	STATUS	`approved`

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Last modified June 19 06:19 EDT 2013. Contains 226399 sequences.