Erroneous version of A001357 printed by mistake on back cover of Encyclopedia of Integer Sequences.
A007881
Erroneous version of A001357 printed by mistake on back cover of Encyclopedia of Integer Sequences.
Terms
- a(0) =1a(1) =2a(2) =4a(3) =8a(4) =18a(5) =71
External references
- oeis: A007881