a(n) is equal to the sum of the factorials of the digits of a(n-1), initial term is 3.

Terms

a(0) =3a(1) =6a(2) =720a(3) =5043a(4) =151a(5) =122a(6) =5a(7) =120a(8) =4a(9) =24a(10) =26a(11) =722a(12) =5044a(13) =169a(14) =363601a(15) =1454a(16) =169a(17) =363601a(18) =1454a(19) =169a(20) =363601a(21) =1454a(22) =169a(23) =363601a(24) =1454a(25) =169a(26) =363601a(27) =1454a(28) =169a(29) =363601