Number of nonsquare divisors of n!.

Terms

a(0) =0a(1) =1a(2) =3a(3) =6a(4) =14a(5) =24a(6) =54a(7) =88a(8) =148a(9) =240a(10) =510a(11) =756a(12) =1548a(13) =2520a(14) =3936a(15) =5248a(16) =10624a(17) =14508a(18) =29196a(19) =40740a(20) =60500a(21) =95400a(22) =191400a(23) =242016a(24) =338880a(25) =529920a(26) =674688a(27) =912912a(28) =1830192a(29) =2327424