The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A191002 Completely multiplicative function with a(prime(k)) = prime(k)*prime(k+1). 4
 1, 6, 15, 36, 35, 90, 77, 216, 225, 210, 143, 540, 221, 462, 525, 1296, 323, 1350, 437, 1260, 1155, 858, 667, 3240, 1225, 1326, 3375, 2772, 899, 3150, 1147, 7776, 2145, 1938, 2695, 8100, 1517, 2622, 3315, 7560, 1763, 6930, 2021, 5148, 7875, 4002, 2491, 19440, 5929, 7350, 4845, 7956, 3127, 20250, 5005, 16632, 6555, 5394, 3599, 18900 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 LINKS FORMULA a(n) = n * A003961(n). - Franklin T. Adams-Watters, Nov 25 2011 PROG (PARI) a(n)=local(fm); fm=factor(n); prod(k=1, matsize(fm)[1], (fm[k, 1]*nextprime(fm[k, 1]+1))^fm[k, 2]) CROSSREFS Cf. A003961, A200746. Sequence in context: A045969 A100513 A338057 * A127469 A103106 A272788 Adjacent sequences:  A190999 A191000 A191001 * A191003 A191004 A191005 KEYWORD nonn,mult AUTHOR Franklin T. Adams-Watters, Jun 16 2011 STATUS approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

Last modified June 20 15:02 EDT 2021. Contains 345165 sequences. (Running on oeis4.)