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A244576 Sum of all proper divisors of all positive integers <= prime(n). 3
0, 0, 2, 7, 23, 38, 69, 89, 133, 227, 268, 397, 483, 536, 632, 821, 1018, 1125, 1355, 1511, 1633, 1890, 2077, 2406, 2906, 3150, 3263, 3509, 3680, 3960, 5026, 5319, 5854, 6003, 6909, 7130, 7761, 8345, 8681, 9381, 9986, 10351, 11456, 11771, 12212, 12481, 14128 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,3

COMMENTS

Also sum of all proper divisors of all positive integers <= prime(n)-1.

Also zero together with the numbers that are repeated in A244049.

LINKS

Table of n, a(n) for n=1..47.

FORMULA

a(n) = A244049(A000040(n)-1) = A244049(A000040(n)).

PROG

(PARI) a(n) = sum(i=2, prime(n), sigma(i)-i-1); \\ Michel Marcus, Sep 29 2014

CROSSREFS

Cf. A000040, A000203, A048050, A244049, A244578, A244583.

Sequence in context: A106020 A248602 A045383 * A089176 A049232 A100917

Adjacent sequences:  A244573 A244574 A244575 * A244577 A244578 A244579

KEYWORD

nonn

AUTHOR

Omar E. Pol, Jun 30 2014

EXTENSIONS

More terms from Michel Marcus, Sep 29 2014

STATUS

approved

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Last modified August 14 01:55 EDT 2020. Contains 336476 sequences. (Running on oeis4.)