a(n) = n! - Sum_{i} p_i!^e_i, where n = Product_{i} (p_i^e_i).
A086684
a(n) = n! - Sum_{i} p_i!^e_i, where n = Product_{i} (p_i^e_i).
Terms
- a(0) =1a(1) =0a(2) =0a(3) =20a(4) =0a(5) =712a(6) =0a(7) =40312a(8) =362844a(9) =3628678a(10) =0a(11) =479001590a(12) =0a(13) =87178286158a(16) =0a(18) =0a(22) =0
External references
- oeis: A086684