Square array T(n,k), n >= 1, k >= 1, read by antidiagonals, where T(n,k) = Sum_{1 <= x_1, x_2, ..., x_k <= n} n/gcd(x_1, x_2, ..., x_k, n).

A372968

Square array T(n,k), n >= 1, k >= 1, read by antidiagonals, where T(n,k) = Sum_{1 <= x_1, x_2, ..., x_k <= n} n/gcd(x_1, x_2, ..., x_k, n).

Terms

    a(0) =1a(1) =1a(2) =3a(3) =1a(4) =7a(5) =7a(6) =1a(7) =15a(8) =25a(9) =11a(10) =1a(11) =31a(12) =79a(13) =55a(14) =21a(15) =1a(16) =63a(17) =241a(18) =239a(19) =121a(20) =21a(21) =1a(22) =127a(23) =727a(24) =991a(25) =621a(26) =175a(27) =43a(28) =1a(29) =255

External references