Let f(n) = number of ways to factor n = A001055(n); a(n) = sum of f(k) over all terms k in A025487 that have n factors.

A035310

Let f(n) = number of ways to factor n = A001055(n); a(n) = sum of f(k) over all terms k in A025487 that have n factors.

Terms

    a(0) =1a(1) =4a(2) =12a(3) =47a(4) =170a(5) =750a(6) =3255a(7) =16010a(8) =81199a(9) =448156a(10) =2579626a(11) =15913058a(12) =102488024a(13) =698976419a(14) =4976098729a(15) =37195337408a(16) =289517846210

External references