Square array A(n,k), n >= 1, k >= 1, read by antidiagonals downwards, where A(n,k) = -(1/n) * Sum_{d|n} phi(n/d) * (-k)^d.
A382993
Square array A(n,k), n >= 1, k >= 1, read by antidiagonals downwards, where A(n,k) = -(1/n) * Sum_{d|n} phi(n/d) * (-k)^d.
Terms
- a(0) =1a(1) =2a(2) =0a(3) =3a(4) =-1a(5) =1a(6) =4a(7) =-3a(8) =4a(9) =0a(10) =5a(11) =-6a(12) =11a(13) =-4a(14) =1a(15) =6a(16) =-10a(17) =24a(18) =-21a(19) =8a(20) =0a(21) =7a(22) =-15a(23) =45a(24) =-66a(25) =51a(26) =-10a(27) =1a(28) =8a(29) =-21
External references
- oeis: A382993