id:A130901 - OEIS Search Results

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SUM(floor(10^n / k): 1 <= k < 10).

+0
2

1, 26, 281, 2827, 28288, 282895, 2828967, 28289681, 282896824, 2828968252, 28289682538, 282896825395, 2828968253967, 28289682539681, 282896825396824, 2828968253968252, 28289682539682538, 282896825396825395 (list; graph; listen)

	OFFSET	`0,2`
	COMMENT	`A055642(a(n)) = n.`
	LINKS	`R. Zumkeller, Table of n, a(n) for n = 0..100`
	EXAMPLE	`a(1) = [10/1]+[10/2]+[10/3]+[10/4]+[10/5]+[10/6]+[10/7]+[10/8]+[10/9] = 10 + 5 + 3 + 2 + 2 + 1 + 1 + 1 + 1 = 26;` `a(2) = [100/1]+[100/2]+[100/3]+[100/4]+[100/5]+[100/6]+[100/7]+[100/8]+[100/9] = 100 + 50 + 33 + 25 + 20 + 16 + 14 + 12 + 11 = 281.`
	CROSSREFS	`Cf. A130890.` `Sequence in context: A006045 A137787 A022686 this_sequence A020925 A125414 A010831` `Adjacent sequences: A130898 A130899 A130900 this_sequence A130902 A130903 A130904`
	KEYWORD	`nonn`
	AUTHOR	`Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), Jun 08 2007`

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Last modified December 2 15:58 EST 2008. Contains 150992 sequences.

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