Number of digits in n!.

Terms

a(0) =1a(1) =1a(2) =1a(3) =1a(4) =2a(5) =3a(6) =3a(7) =4a(8) =5a(9) =6a(10) =7a(11) =8a(12) =9a(13) =10a(14) =11a(15) =13a(16) =14a(17) =15a(18) =16a(19) =18a(20) =19a(21) =20a(22) =22a(23) =23a(24) =24a(25) =26a(26) =27a(27) =29a(28) =30a(29) =31