OFFSET
1,2
COMMENTS
Terms of the sequence can be presented as products of the following distinct prime factors: 1, 3, 3*11, 3*11*131, 3*11*131*17291, 3*11*131*17291*298995971. Alexander R. Povolotsky, Jan 19 2012
Those factors are A121897(m) for m >= 5. - Alexander R. Povolotsky, Jun 17 2012
FORMULA
a(n) = product(A126604(k), k=2...n) for n >= 2.
CROSSREFS
KEYWORD
nonn
AUTHOR
Alexander R. Povolotsky, Jan 19 2012
STATUS
approved