a(n) is the least positive integer such that the integer part of the arithmetic-geometric mean of a(n) and 2^n is equal to 3^n.
A090857
a(n) is the least positive integer such that the integer part of the arithmetic-geometric mean of a(n) and 2^n is equal to 3^n.
Terms
- a(0) =1a(1) =5a(2) =17a(3) =59a(4) =203a(5) =690a(6) =2308a(7) =7621a(8) =24913a(9) =80794a(10) =260303a(11) =834057a(12) =2660049a(13) =8449715a(14) =26747224a(15) =84407894a(16) =265647824a(17) =834016199a(18) =2612728134a(19) =8168761695a(20) =25494031748a(21) =79434416090a(22) =247130166428a(23) =767788267178
External references
- oeis: A090857