3-adic valuation of binomial(2*n, n): largest k such that 3^k divides binomial(2*n, n).

Terms

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