OFFSET
1,2
COMMENTS
Previous term * prime(previous term). Previous term + prime(previous term) is A074271.
Matula-Goebel numbers of the finite ordinal numbers; see also A007097. - Gus Wiseman, Aug 30 2016
MATHEMATICA
NestList[# Prime@ # &, 1, 6] (* Michael De Vlieger, Aug 30 2016 *)
CROSSREFS
KEYWORD
nonn,hard,more
AUTHOR
Zak Seidov, Nov 02 2002
EXTENSIONS
a(7) from Gus Wiseman, Aug 30 2016
STATUS
approved