Exponential transform of C(n,5) = A000389.

Terms

a(0) =1a(1) =0a(2) =0a(3) =0a(4) =0a(5) =1a(6) =6a(7) =21a(8) =56a(9) =126a(10) =378a(11) =3234a(12) =34056a(13) =289575a(14) =2020018a(15) =12237225a(16) =70634928a(17) =468041756a(18) =4190274648a(19) =45557515620a(20) =499503011496