A123806 - OEIS

A123806

Number of ways to build a contiguous building with n LEGO blocks of size 1x7 on top of a fixed block of the same size.

62, 5188, 603490, 77670923, 10795814511, 1572624052679 (list; graph; refs; listen; history; text; internal format)

	OFFSET	`1,1`
	COMMENTS	`The base block is not counted among the n and must be the only block in the bottom layer of the building`
	LINKS	`Table of n, a(n) for n=1..6.`
	CROSSREFS	`Cf. A112389, A123762 - A123827, A123829 - A123849.` `Sequence in context: A042861 A056639 A289297 * A233340 A299826 A209905` `Adjacent sequences: A123803 A123804 A123805 * A123807 A123808 A123809`
	KEYWORD	`nonn,hard`
	AUTHOR	`Søren Eilers, Oct 29 2006`
	STATUS	`approved`

Last modified July 4 11:26 EDT 2022. Contains 355075 sequences. (Running on oeis4.)