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A048947 Let b(n) be the terms of A046528. Then sigma(b(n))=2^(a(n)), where sigma=A000203 is the sum of divisors function. 3
0, 2, 3, 5, 5, 7, 7, 8, 9, 10, 10, 12, 12, 13, 14, 15, 15, 16, 17, 17, 18, 18, 19, 19, 20, 20, 20, 21, 21, 22, 22, 22, 22, 23, 23, 24, 24, 24, 24, 25, 25, 25, 26, 26, 26, 27, 27, 27, 27, 28, 28, 29, 29, 29, 29, 30, 30, 31, 31, 31, 31, 32, 32, 32, 33, 33, 33, 34, 34, 34, 34, 35 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..72.

Eric Weisstein's World of Mathematics, Divisor Function.

CROSSREFS

Cf. A048528.

Sequence in context: A002334 A115732 A246578 * A222312 A298676 A114519

Adjacent sequences:  A048944 A048945 A048946 * A048948 A048949 A048950

KEYWORD

nonn

AUTHOR

Eric W. Weisstein

EXTENSIONS

Definition edited by Daniel Forgues, Nov 07 2009

Offset to 1 by R. J. Mathar, Sep 22 2016

STATUS

approved

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Last modified March 21 07:23 EDT 2019. Contains 321367 sequences. (Running on oeis4.)