Integer values of (1*2*...*k)/(1+2+...+k) = k!/T(k) = A000142(k)/A000217(k), k>=1.

A108552

Integer values of (1*2*...*k)/(1+2+...+k) = k!/T(k) = A000142(k)/A000217(k), k>=1.

Terms

    a(0) =1a(1) =1a(2) =8a(3) =180a(4) =1120a(5) =8064a(6) =604800a(7) =68428800a(8) =830269440a(9) =10897286400

External references