Periods of sum of 5th powers of digits iterated until the sequence becomes periodic.

Terms

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