id:A127975 - OEIS Search Results

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Repeat 3^n three times.

+0
2

1, 1, 1, 3, 3, 3, 9, 9, 9, 27, 27, 27, 81, 81, 81, 243, 243, 243, 729, 729, 729, 2187, 2187, 2187, 6561, 6561, 6561, 19683, 19683, 19683, 59049, 59049, 59049, 177147, 177147, 177147, 531441, 531441, 531441, 1594323, 1594323, 1594323, 4782969, 4782969, 4782969 (list; graph; listen)

	OFFSET	`0,4`
	FORMULA	`G.f.: (1+x+x^2)/(1-3*x^3).`
	CROSSREFS	`Sequence in context: A111521 A029628 A132171 this_sequence A060828 A097707 A115282` `Adjacent sequences: A127972 A127973 A127974 this_sequence A127976 A127977 A127978`
	KEYWORD	`easy,nonn`
	AUTHOR	`Paul Barry (pbarry(AT)wit.ie), Feb 09 2007`
	EXTENSIONS	`Edited and corrected by R. J. Mathar, Jun 14 2008`

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Last modified July 26 13:41 EDT 2008. Contains 142293 sequences.

AT&T Labs Research