id:A134230 - OEIS Search Results

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Sum of first 10^n - 1 odd numbers.

+0
3

3, 120, 10200, 1002000, 100020000, 10000200000, 1000002000000, 100000020000000, 10000000200000000, 1000000002000000000, 100000000020000000000, 10000000000200000000000, 1000000000002000000000000, 100000000000020000000000000, 10000000000000200000000000000 (list; graph; listen)

	OFFSET	`1,1`
	FORMULA	`a(n) = (10^n+1)^2-1. - njas, Oct 15 2007`
	CROSSREFS	`Cf. A134228 A134229.` `Sequence in context: A143781 A114077 A103743 this_sequence A141440 A012569 A078258` `Adjacent sequences: A134227 A134228 A134229 this_sequence A134231 A134232 A134233`
	KEYWORD	`easy,nonn`
	AUTHOR	`Enoch Haga (Enokh(AT)comcast.net), Oct 14 2007`
	EXTENSIONS	`Edited by njas, Oct 15 2007`

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Last modified December 4 21:35 EST 2008. Contains 151309 sequences.

AT&T Labs Research