Number of digits in n^(n!).

Terms

a(0) =1a(1) =1a(2) =1a(3) =3a(4) =15a(5) =84a(6) =561a(7) =4260a(8) =36413a(9) =346276a(10) =3628801a(11) =41569064a(12) =516929544a(13) =6936548425a(14) =99917483647