Sum of exponents in prime-power factorization of binomial(6n, 2n).

Terms

a(0) =0a(1) =2a(2) =4a(3) =6a(4) =6a(5) =8a(6) =11a(7) =11a(8) =10a(9) =11a(10) =13a(11) =18a(12) =17a(13) =17a(14) =17a(15) =19a(16) =18a(17) =20a(18) =19a(19) =22a(20) =22a(21) =23a(22) =27a(23) =28a(24) =27a(25) =26a(26) =29a(27) =31a(28) =29a(29) =31