Sum of exponents in prime-power factorization of C(4n,n+3).

Terms

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