Nearest prime to n! (but not equal to n!).

Terms

a(0) =2a(1) =3a(2) =5a(3) =23a(4) =113a(5) =719a(6) =5039a(7) =40343a(8) =362867a(9) =3628789a(10) =39916801a(11) =479001599a(12) =6227020777a(13) =87178291199