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

Terms

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