a(n) is the least positive integer such that the integer part of the arithmetic-geometric mean of a(n) and 1 is equal to 3^n.
A090856
a(n) is the least positive integer such that the integer part of the arithmetic-geometric mean of a(n) and 1 is equal to 3^n.
Terms
- a(0) =1a(1) =7a(2) =27a(3) =104a(4) =378a(5) =1327a(6) =4553a(7) =15351a(8) =51072a(9) =168147a(10) =548915a(11) =1779377a(12) =5734022a(13) =18384612a(14) =58688163a(15) =186632570a(16) =591509670a(17) =1869118923a(18) =5890466415a(19) =18518945789a(20) =58094637801a(21) =181884111404a(22) =568416743474
External references
- oeis: A090856