a(1)=9, a(n_even)=(a(n-1)^2-1)/2; a(n_odd)=a(n-1)+1.
A076603
a(1)=9, a(n_even)=(a(n-1)^2-1)/2; a(n_odd)=a(n-1)+1.
Terms
- a(0) =9a(1) =40a(2) =41a(3) =840a(4) =841a(5) =353640a(6) =353641a(7) =62530978440a(8) =62530978441
External references
- oeis: A076603