id:A002278 - OEIS Search Results

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4(10^n - 1)/9.

+0
6

0, 4, 44, 444, 4444, 44444, 444444, 4444444, 44444444, 444444444, 4444444444, 44444444444, 444444444444, 4444444444444, 44444444444444, 444444444444444, 4444444444444444, 44444444444444444 (list; graph; listen)

	OFFSET	`0,2`
	FORMULA	`a(n)=10*a(n-1)+4, with a(0)=0 [From Paolo P. Lava (ppl(AT)spl.at), Jan 23 2009]`
	CROSSREFS	`Sequence in context: A043039 A002754 A105038 this_sequence A112897 A163013 A087813` `Adjacent sequences: A002275 A002276 A002277 this_sequence A002279 A002280 A002281`
	KEYWORD	`easy,nonn`
	AUTHOR	`N. J. A. Sloane (njas(AT)research.att.com).`

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Last modified November 30 13:13 EST 2009. Contains 167758 sequences.

AT&T Labs Research