Number of non-unitary divisors of n!.

Terms

a(0) =0a(1) =0a(2) =0a(3) =4a(4) =8a(5) =22a(6) =44a(7) =80a(8) =144a(9) =254a(10) =508a(11) =760a(12) =1520a(13) =2528a(14) =3968a(15) =5312a(16) =10624a(17) =14560a(18) =29120a(19) =40784a(20) =60544a(21) =95744a(22) =191488a(23) =242368a(24) =339520a(25) =531712a(26) =676864a(27) =916768a(28) =1833536a(29) =2331776