1,2

a(1)=1; for n>1 a(n) = (n^(n+1)-1)/(n-1) - 1. - Benoit Cloitre (benoit7848c(AT)orange.fr), Aug 17 2002

Sequence in context: A007322 A058191 A113347 this_sequence A124577 A006678 A145709

Adjacent sequences: A031969 A031970 A031971 this_sequence A031973 A031974 A031975

nonn

N. J. A. Sloane (njas(AT)research.att.com).