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A074369 Number of divisors of Sum_{i=1,...,n} prime(i). 0
2, 2, 4, 2, 6, 2, 4, 4, 9, 4, 12, 2, 8, 2, 8, 4, 16, 4, 8, 6, 8, 4, 8, 6, 12, 8, 10, 4, 16, 8, 16, 4, 12, 4, 6, 4, 16, 4, 8, 12, 8, 6, 8, 4, 12, 4, 8, 4, 16, 8, 12, 12, 16, 4, 4, 8, 16, 4, 4, 2, 8, 6, 8, 2, 4, 4, 8, 8, 8, 8, 16, 4, 8, 8, 4, 8, 16, 6, 20, 12, 6, 4, 12, 16, 16, 8, 24, 12, 12, 8, 24 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..91.

EXAMPLE

The number of divisors of prime(1) + prime(2) + prime(3) = 2 + 3 + 5 = 10 is 4, so a(3) = 4.

MATHEMATICA

s = 0; l = {}; Do[s = s + Prime[i]; l = Append[l, DivisorSigma[0, s]], {i, 1, 100}]; l

CROSSREFS

Sequence in context: A284476 A082174 A278235 * A323407 A073348 A287093

Adjacent sequences:  A074366 A074367 A074368 * A074370 A074371 A074372

KEYWORD

easy,nonn

AUTHOR

Joseph L. Pe, Sep 24 2002

STATUS

approved

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Last modified January 17 20:36 EST 2020. Contains 330987 sequences. (Running on oeis4.)