Define a set of generalized Syracuse sequences starting with x(1)=2*n+1 a positive odd integer, if x(i) is odd prime set x(i+1)=67*x(i)+1, if x(i) is odd not prime set x(i+1)=3*x(i)+1 and if x(i) is even then set x(i+1)=x(i)/2. Then a(n) is the first index i > 1 at which x(i) reaches 1.
A300286
Define a set of generalized Syracuse sequences starting with x(1)=2*n+1 a positive odd integer, if x(i) is odd prime set x(i+1)=67*x(i)+1, if x(i) is odd not prime set x(i+1)=3*x(i)+1 and if x(i) is even then set x(i+1)=x(i)/2. Then a(n) is the first index i > 1 at which x(i) reaches 1.
Terms
- a(0) =4a(1) =209166a(2) =13a(3) =207226a(4) =207229a(5) =384614a(6) =384602a(7) =32a(8) =104820a(9) =403030a(10) =8a(11) =30a(12) =403033a(13) =118516a(14) =39365a(15) =403070a(16) =403036a(17) =118323a(18) =11641a(19) =118425a(20) =118514a(21) =89369a(22) =104824a(23) =180241a(24) =11644a(25) =39371a(26) =118321a(27) =118294a(28) =89372a(29) =118423
External references
- oeis: A300286