Number of nontrivial divisors of n!.

Terms

a(0) =0a(1) =0a(2) =0a(3) =2a(4) =6a(5) =14a(6) =28a(7) =58a(8) =94a(9) =158a(10) =268a(11) =538a(12) =790a(13) =1582a(14) =2590a(15) =4030a(16) =5374a(17) =10750a(18) =14686a(19) =29374a(20) =41038a(21) =60798a(22) =95998a(23) =191998a(24) =242878a(25) =340030a(26) =532222a(27) =677374a(28) =917278a(29) =1834558