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} gcd(x_1, x_2, ..., x_k).

A344479

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} gcd(x_1, x_2, ..., x_k).

Terms

    a(0) =1a(1) =1a(2) =3a(3) =1a(4) =5a(5) =6a(6) =1a(7) =9a(8) =12a(9) =10a(10) =1a(11) =17a(12) =30a(13) =24a(14) =15a(15) =1a(16) =33a(17) =84a(18) =76a(19) =37a(20) =21a(21) =1a(22) =65a(23) =246a(24) =276a(25) =141a(26) =61a(27) =28a(28) =1a(29) =129

External references