Number of divisors of n! that are coprime to n.

Terms

a(0) =1a(1) =1a(2) =2a(3) =2a(4) =8a(5) =2a(6) =30a(7) =12a(8) =32a(9) =10a(10) =270a(11) =12a(12) =792a(13) =72a(14) =144a(15) =336a(16) =5376a(17) =96a(18) =14688a(19) =432a(20) =1520a(21) =1600a(22) =96000a(23) =960a(24) =48576a(25) =7392a(26) =48384a(27) =7056a(28) =917280a(29) =720