Sum of exponents in prime-power factorization of multinomial coefficient M(3n; n,n,n).

Terms

a(0) =0a(1) =2a(2) =4a(3) =7a(4) =7a(5) =9a(6) =11a(7) =14a(8) =12a(9) =13a(10) =14a(11) =19a(12) =18a(13) =20a(14) =22a(15) =23a(16) =19a(17) =23a(18) =22a(19) =27a(20) =25a(21) =25a(22) =30a(23) =33a(24) =30a(25) =30a(26) =32a(27) =33a(28) =31a(29) =34