OFFSET
1,1
COMMENTS
Sums (divisors) associated with A140761.
LINKS
Amiram Eldar, Table of n, a(n) for n = 1..1000
FORMULA
EXAMPLE
a(2)=10 because when 30 is divided by 10, the quotient is 3 and integral.
MATHEMATICA
Module[{nn=200, s, p}, s=Accumulate[Prime[Range[nn]]]; p=FoldList[ Times, Prime[ Range[nn]]]; Select[Thread[{p, s}], Divisible[#[[1]], #[[2]]]&]][[All, 2]] (* Harvey P. Dale, Jun 07 2022 *)
CROSSREFS
KEYWORD
nonn
AUTHOR
Enoch Haga, May 28 2008
EXTENSIONS
Corrected and edited by N. J. A. Sloane, Oct 01 2011
STATUS
approved