Sum of digits of n^(n!).

Terms

a(0) =0a(1) =1a(2) =4a(3) =18a(4) =73a(5) =334a(6) =2592a(7) =18919a(8) =164476a(9) =1558521a(10) =1a(11) =187044031a(12) =2326111614a(13) =31214008090