Least m>0 such that m^4 >= n!.

Terms

a(0) =1a(1) =2a(2) =2a(3) =3a(4) =4a(5) =6a(6) =9a(7) =15a(8) =25a(9) =44a(10) =80a(11) =148a(12) =281a(13) =544a(14) =1070a(15) =2139a(16) =4343a(17) =8946a(18) =18676a(19) =39495a(20) =84545a(21) =183102a(22) =400981a(23) =887517a(24) =1984548a(25) =4481308a(26) =10215173a(27) =23498233a(28) =54529901a(29) =127618907