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A049000 Sum of sigma(j) for 1<=j<10^n, where sigma(j) is the sum of divisors of j. 3
0, 69, 8082, 820741, 82231803, 8224494757, 822465638000, 82246686892516, 8224670172682646, 822467031614802290, 82246703327412473943 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

COMMENTS

The ratio of successive terms approaches 100.

LINKS

Table of n, a(n) for n=0..10.

EXAMPLE

For n=1, the sum of sigma(j) for j<10 is 1+3+4+7+6+12+8+15+13=69, so a(1)=69.

CROSSREFS

Cf. A000203.

Cf. A072692 (sum for 1<=j<=10^n and other links).

Sequence in context: A296785 A264171 A297550 * A234824 A232719 A297807

Adjacent sequences:  A048997 A048998 A048999 * A049001 A049002 A049003

KEYWORD

nonn

AUTHOR

Enoch Haga and Jud McCranie

EXTENSIONS

One more term from Rick L. Shepherd, Jul 03 2002

STATUS

approved

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Last modified February 22 05:17 EST 2019. Contains 320385 sequences. (Running on oeis4.)