Periods of sum of 7th powers of digits iterated until the sequence becomes periodic.

Terms

a(0) =1a(1) =1a(2) =92a(3) =14a(4) =30a(5) =92a(6) =56a(7) =6a(8) =92a(9) =56a(10) =1a(11) =92a(12) =27a(13) =30a(14) =92a(15) =56a(16) =30a(17) =12a(18) =27a(19) =21a(20) =92a(21) =27a(22) =2a(23) =92a(24) =27a(25) =30a(26) =12a(27) =56a(28) =30a(29) =92