OFFSET
0,1
LINKS
FORMULA
From Amiram Eldar, Nov 15 2023: (Start)
Multiplicative with a(2) = 4, a(2^e) = 22 for e >= 2, and a(p^e) = 1 for an odd prime p.
Dirichlet g.f.: zeta(s) * (1 + 3/2^s + 9/2^(2*s-1)). (End)
MATHEMATICA
ContinuedFraction[Sqrt[140], 300] (* Vladimir Joseph Stephan Orlovsky, Mar 13 2011 *)
CROSSREFS
KEYWORD
nonn,cofr,easy,mult
AUTHOR
STATUS
approved