16777233domain: NAppears in sequencesa(n) = Sum_{ k, k|n } 2^(k-1).at n=24A034729a(n) = (-1)^(n+1) * coefficient of x^n in Sum_{k>=1} x^k/(1+2*x^k).at n=24A081295Square array A(n,k), n >= 1, k >= 0, read by antidiagonals, where A(n,k) is Sum_{d|n} d^(k*(d-1)).at n=31A308701a(n) = Sum_{d|n} (-1)^(d-1) * 2^(n/d-1).at n=24A373275