Sum of exponents in prime-power factorization of C(5n,n-4).

Terms

a(0) =0a(1) =2a(2) =3a(3) =4a(4) =5a(5) =6a(6) =9a(7) =9a(8) =9a(9) =10a(10) =11a(11) =10a(12) =12a(13) =13a(14) =15a(15) =13a(16) =15a(17) =16a(18) =15a(19) =15a(20) =16a(21) =17a(22) =21a(23) =22a(24) =22a(25) =22a(26) =24a(27) =19a(28) =21a(29) =22