Sum of exponents of primes in C(4n,2n) - sum of exponents of primes in C(2n,n).

Terms

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