Square array A(n,k), n >= 1, k >= 0, read by antidiagonals, where A(n,k) is Sum_{d|n} d^(k*(d-1)).

Terms

a(0) =1a(1) =1a(2) =2a(3) =1a(4) =3a(5) =2a(6) =1a(7) =5a(8) =10a(9) =3a(10) =1a(11) =9a(12) =82a(13) =67a(14) =2a(15) =1a(16) =17a(17) =730a(18) =4101a(19) =626a(20) =4a(21) =1a(22) =33a(23) =6562a(24) =262153a(25) =390626a(26) =7788a(27) =2a(28) =1a(29) =65