8-multiplicative persistence: number of iterations of "multiply 8th powers of digits" needed to reach 0 or 1.

A031354

8-multiplicative persistence: number of iterations of "multiply 8th powers of digits" needed to reach 0 or 1.

Terms

    a(0) =0a(1) =3a(2) =3a(3) =3a(4) =2a(5) =4a(6) =2a(7) =3a(8) =2a(9) =1a(10) =1a(11) =3a(12) =3a(13) =3a(14) =2a(15) =4a(16) =2a(17) =3a(18) =2a(19) =1a(20) =3a(21) =3a(22) =4a(23) =3a(24) =2a(25) =3a(26) =2a(27) =3a(28) =2a(29) =1

External references