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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
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OFFSET
1,1
LINKS
Table of n, a(n) for n=1..13.
CROSSREFS
Cf.
A031974
,
A001414
.
Sequence in context:
A356043
A225919
A348586
*
A135719
A089776
A073626
Adjacent sequences:
A064765
A064766
A064767
*
A064769
A064770
A064771
KEYWORD
nonn
,
base
AUTHOR
Jason Earls
, Oct 18 2001
STATUS
approved
