Number of digits in n! excluding final zeros.

Terms

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