First integer reached when starting with n/floor(sqrt(n)) and iterating the map x -> x*ceiling(x) A075120(n) times, or -1 if no integer is ever reached.
A075121
First integer reached when starting with n/floor(sqrt(n)) and iterating the map x -> x*ceiling(x) A075120(n) times, or -1 if no integer is ever reached.
Terms
- a(0) =1a(1) =2a(2) =3a(3) =2a(4) =60a(5) =3a(6) =14a(7) =4a(8) =3a(10) =220a(11) =4a(12) =227370a(13) =560a(14) =5a(15) =4a(16) =218790a(17) =268065a(18) =570a(19) =5a(20) =1008a(21) =33a(22) =1458660a(23) =6a(24) =5
External references
- oeis: A075121