Sum of exponents in prime-power factorization of C(5n,n-1).

Terms

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