Table T(n,k) = phi(phi(prime(n)^k)), n >= 1, k >= 0, read by upwards antidiagonals, where phi = A000010.
A380500
Table T(n,k) = phi(phi(prime(n)^k)), n >= 1, k >= 0, read by upwards antidiagonals, where phi = A000010.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =1a(4) =1a(5) =1a(6) =1a(7) =2a(8) =2a(9) =2a(10) =1a(11) =2a(12) =8a(13) =6a(14) =4a(15) =1a(16) =4a(17) =12a(18) =40a(19) =18a(20) =8a(21) =1a(22) =4a(23) =40a(24) =84a(25) =200a(26) =54a(27) =16a(28) =1a(29) =8
External references
- oeis: A380500