Square array A(n,k), n >= 1, k >= 1, read by antidiagonals downwards, where A(n,k) = Sum_{d|n} phi(n/d) * (-k)^(d-1).
A382995
Square array A(n,k), n >= 1, k >= 1, read by antidiagonals downwards, where A(n,k) = Sum_{d|n} phi(n/d) * (-k)^(d-1).
Terms
- a(0) =1a(1) =1a(2) =0a(3) =1a(4) =-1a(5) =3a(6) =1a(7) =-2a(8) =6a(9) =0a(10) =1a(11) =-3a(12) =11a(13) =-8a(14) =5a(15) =1a(16) =-4a(17) =18a(18) =-28a(19) =20a(20) =0a(21) =1a(22) =-5a(23) =27a(24) =-66a(25) =85a(26) =-30a(27) =7a(28) =1a(29) =-6
External references
- oeis: A382995