Number of iterations of transformation in A037280 needed to reach 1 or a prime, or -1 if no such number exists.
A037281
Number of iterations of transformation in A037280 needed to reach 1 or a prime, or -1 if no such number exists.
Terms
- a(0) =0a(1) =0a(2) =0a(3) =1a(4) =0a(5) =1a(6) =0a(7) =1a(8) =1a(9) =2a(10) =0
External references
- oeis: A037281