OFFSET
1,2
COMMENTS
Complement of A171524(n). [From Jaroslav Krizek, Dec 13 2009]
EXAMPLE
a(1)= 1*1 = 1, a(2)= 2*4 = 8, a(3)= 3*6 = 18, ...
CROSSREFS
KEYWORD
nonn
AUTHOR
Jaroslav Krizek, Dec 11 2009
STATUS
approved