id:A090843 - OEIS Search Results

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Number of nodes on a tree with degree 11 interior nodes and degree 1 boundary nodes.

+0
4

1, 12, 122, 1222, 12222, 122222, 1222222, 12222222, 122222222, 1222222222, 12222222222, 122222222222, 1222222222222, 12222222222222, 122222222222222, 1222222222222222, 12222222222222222, 122222222222222222 (list; graph; listen)

	OFFSET	`0,2`
	REFERENCES	`L. He, X. Liu and G. Strang, (2003) Trees with Cantor Eigenvalue Distribution. Studies in Applied Mathematics 110 (2), 123-138`
	FORMULA	`a(n)=(11*10^n-2)/9`
	CROSSREFS	`Sequence in context: A038490 A037551 A134584 this_sequence A132927 A113574 A078189` `Adjacent sequences: A090840 A090841 A090842 this_sequence A090844 A090845 A090846`
	KEYWORD	`easy,nonn`
	AUTHOR	`Paul Barry (pbarry(AT)wit.ie), Dec 09 2003`

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Last modified July 25 07:41 EDT 2008. Contains 142293 sequences.

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