OFFSET
1,1
LINKS
Reinhard Zumkeller, Products of largest prime factors of numbers <= n.
FORMULA
a(n) = (a(n-1) - 1) * A006530(n) + 1 for n>1, a(1) = 0;
MATHEMATICA
FoldList[Times, Array[FactorInteger[#][[-1, 1]] &, 30]] + 1 (* Amiram Eldar, Apr 08 2024 *)
CROSSREFS
KEYWORD
nonn
AUTHOR
Reinhard Zumkeller, Mar 06 2005
STATUS
approved