a(n)=a(n-1)*a(n-2)*a(n-3)*(1/a(n-1)+1/a(n-2)+1/a(n-3)) starting with a(1)=a(2)=1 and a(3)=2.
A074046
a(n)=a(n-1)*a(n-2)*a(n-3)*(1/a(n-1)+1/a(n-2)+1/a(n-3)) starting with a(1)=a(2)=1 and a(3)=2.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =5a(4) =17a(5) =129a(6) =2923a(7) =428951a(8) =1309535519
External references
- oeis: A074046