Number of odd divisors of n!.

Terms

a(0) =1a(1) =1a(2) =1a(3) =2a(4) =2a(5) =4a(6) =6a(7) =12a(8) =12a(9) =20a(10) =30a(11) =60a(12) =72a(13) =144a(14) =216a(15) =336a(16) =336a(17) =672a(18) =864a(19) =1728a(20) =2160a(21) =3200a(22) =4800a(23) =9600a(24) =10560a(25) =14784a(26) =22176a(27) =28224a(28) =35280a(29) =70560