Sum of exponents in prime-power factorization of binomial(6n, n).

Terms

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