OFFSET
1,1
COMMENTS
a(7) through a(10) have 98, 133, 193 and 285 digits, respectively.
FORMULA
a(n) = (p(n)#)^p(n), where p(n) is n-th prime and # denotes primorial (A002110).
EXAMPLE
a(3) = 24300000 because (p(3)#)^p(3) = (5*3*2)^5 = 30^5 = 24300000.
MATHEMATICA
With[{nn=6}, First[#]^Last[#]&/@Thread[{Rest[FoldList[Times, 1, Prime[ Range[nn]]]], Prime[Range[nn]]}]] (* Harvey P. Dale, Mar 16 2012 *)
PROG
(PARI) for(n=1, 6, print1((prod(k=1, n, prime(k)))^prime(n), ", "))
CROSSREFS
KEYWORD
easy,nonn
AUTHOR
Rick L. Shepherd, Jul 03 2002
STATUS
approved