Number of iterations of the map n -> sum of the n-powers of the decimal digits of n.

Terms

a(0) =0a(1) =8a(2) =3a(3) =25a(4) =18a(5) =57a(6) =8a(7) =169a(8) =181a(9) =1a(10) =61a(11) =164a(12) =177a(13) =573a(14) =209a(15) =785a(16) =288a(17) =1121a(18) =347a(19) =517a(20) =549a(21) =2219a(22) =53a(23) =481a(24) =871a(25) =3144a(26) =878a(27) =3336a(28) =777a(29) =2369