a(1) = 1; if the sum of the digits of 2*a(n-1) + 1 is not yet in the sequence then a(n) = 2*a(n-1) + 1; otherwise a(n) is the sum of digits of a(n-1).
A348483
a(1) = 1; if the sum of the digits of 2*a(n-1) + 1 is not yet in the sequence then a(n) = 2*a(n-1) + 1; otherwise a(n) is the sum of digits of a(n-1).
Terms
- a(0) =1a(1) =3a(2) =7a(3) =15a(4) =6a(5) =13a(6) =4a(7) =9a(8) =19a(9) =10a(10) =21a(11) =43a(12) =87a(13) =175a(14) =351a(15) =703a(16) =1407a(17) =12a(18) =25a(19) =51a(20) =103a(21) =207a(22) =415a(23) =831a(24) =1663a(25) =16a(26) =33a(27) =67a(28) =135a(29) =271
External references
- oeis: A348483