Square array A(n,k), n >= 1, k >= 0, where A(n,k) = Sum_{d|n} d^(k*n/d - k + 1), read by antidiagonals.
A308690
Square array A(n,k), n >= 1, k >= 0, where A(n,k) = Sum_{d|n} d^(k*n/d - k + 1), read by antidiagonals.
Terms
- a(0) =1a(1) =1a(2) =3a(3) =1a(4) =3a(5) =4a(6) =1a(7) =3a(8) =4a(9) =7a(10) =1a(11) =3a(12) =4a(13) =9a(14) =6a(15) =1a(16) =3a(17) =4a(18) =13a(19) =6a(20) =12a(21) =1a(22) =3a(23) =4a(24) =21a(25) =6a(26) =24a(27) =8a(28) =1a(29) =3
External references
- oeis: A308690