Invitation: celebrating 50 years of OEIS, 250000 sequences, and Sloane's 75th, there will be a conference at DIMACS, Rutgers, Oct 9-10 2014.
1,2
Next term, a(10), if it exists, is >A000931(18440) with >2252 digits. - R. J. Mathar, Jan 21 2008
Table of n, a(n) for n=1..9.
Cf. A000931.
Sequence in context: A117600 A117601 A117604 * A026450 A240178 A039863
Adjacent sequences: A117600 A117601 A117602 * A117604 A117605 A117606
nonn,base
Luc Stevens (lms022(AT)yahoo.com), Apr 05 2006
approved