First numerator and then denominator of the central elements of the 1/3-Pascal triangle (by row).

Terms

a(0) =1a(1) =1a(2) =1a(3) =3a(4) =8a(5) =3a(6) =10a(7) =1a(8) =110a(9) =3a(10) =406a(11) =3a(12) =504a(13) =1a(14) =1892a(15) =1a(16) =7150a(17) =1a(18) =27170a(19) =1a(20) =311168a(21) =3a(22) =1192516a(23) =3a(24) =1528436a(25) =1a(26) =17681020a(27) =3a(28) =68346800a(29) =3