A048828 - OEIS

A048828

Number of identity (asymmetric) trees of width n.

1, 0, 0, 0, 0, 1, 4, 66, 65328, 2146402440 (list; graph; refs; listen; history; text; internal format)

	OFFSET	`0,7`
	LINKS	`Table of n, a(n) for n=0..9.` `Index entries for sequences related to trees`
	FORMULA	`a(2n) = 2^(c(n-2))(2^b(n-1) - b(n-1)-1), a(2n+1) = b(n)(b(n)-1)/2, b: A038081. c: A014221.`
	CROSSREFS	`Sequence in context: A302657 A198893 A279886 * A225940 A003360 A225772` `Adjacent sequences: A048825 A048826 A048827 * A048829 A048830 A048831`
	KEYWORD	`nonn`
	AUTHOR	`Christian G. Bower, Jun 15 1999`
	STATUS	`approved`

Last modified March 31 00:51 EDT 2023. Contains 361623 sequences. (Running on oeis4.)