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

Author

Eric W. Weisstein

Keywords

• nonn

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.

Crossrefs

Cf. A046528.

Programs

PARI

See Corneth link \\ David A. Corneth, Oct 21 2019

Extensions

Definition edited by Daniel Forgues, Nov 07 2009

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