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)=a(3)=1.
A074047
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)=a(3)=1.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =3a(4) =7a(5) =31a(6) =331a(7) =12795a(8) =4642051a(9) =60935796571
External references
- oeis: A074047