A075656 n + product of prime factors of n.

1, 4, 6, 6, 10, 12, 14, 10, 12, 20, 22, 18, 26, 28, 30, 18, 34, 24, 38, 30, 42, 44, 46, 30, 30, 52, 30, 42, 58, 60, 62, 34, 66, 68, 70, 42, 74, 76, 78, 50, 82, 84, 86, 66, 60, 92, 94, 54, 56, 60, 102, 78, 106, 60, 110, 70, 114, 116, 118, 90, 122, 124, 84, 66, 130, 132

Offset: 1

Author

Joseph L. Pe, Oct 12 2002

Keywords

• easy
• nonn

Comments

Prime factors taken without multiplicity. - Harvey P. Dale, Feb 27 2021

Examples

			6 + product of prime factors of 6 = 6 + 2 * 3 = 12, so a(6) = 12.
		

Links

• Harvey P. Dale, Table of n, a(n) for n = 1..1000

Programs

Mathematica

Flatten[Append[{1}, Table[n + Apply[Times, Transpose[FactorInteger[n]][[1]]], {n, 2, 100}]]]
Join[{1},Table[n+Times@@FactorInteger[n][[All,1]],{n,2,70}]] (* Harvey P. Dale, Feb 27 2021 *)

Formula

a(n)=A073353(n), n>1. [From R. J. Mathar, Sep 23 2008]