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A064768 Sum of primes dividing the repunit numbers with a prime number of digits [A031974] (with repetition). 0
11, 40, 312, 4888, 534888, 265371785, 5365294080, 1111111111111111111, 11111111111111111111111, 77843964391, 57336415063797550469, 2212394296770453025145, 201763709900322803748658482662 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..13.

CROSSREFS

Cf. A031974, A001414.

Sequence in context: A064798 A056124 A225919 * A135719 A089776 A073626

Adjacent sequences:  A064765 A064766 A064767 * A064769 A064770 A064771

KEYWORD

nonn,base

AUTHOR

Jason Earls, Oct 18 2001

STATUS

approved

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Last modified June 6 13:49 EDT 2020. Contains 334827 sequences. (Running on oeis4.)