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.

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

Offset

1,2

Links

David A. Corneth, Table of n, a(n) for n = 1..13133

David A. Corneth, PARI program

Eric Weisstein's World of Mathematics, Divisor Function.

Prog

(PARI) See Corneth link \\ David A. Corneth, Oct 21 2019

Crossrefs

Cf. A046528.

Sequence in context: A002334 A115732 A246578 * A342658 A222312 A344404

Adjacent sequences: A048944 A048945 A048946 * A048948 A048949 A048950

Keyword

nonn

Author

Eric W. Weisstein

Extensions

Definition edited by Daniel Forgues, Nov 07 2009

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

Status

approved