Triangle, read by rows, such that the g.f. of column k = G(x)^(2k+1) where G(x) = 1 + x*G(x)^3 is the g.f. of A001764 (ternary trees).

A143603

Triangle, read by rows, such that the g.f. of column k = G(x)^(2k+1) where G(x) = 1 + x*G(x)^3 is the g.f. of A001764 (ternary trees).

Terms

    a(0) =1a(1) =1a(2) =1a(3) =3a(4) =3a(5) =1a(6) =12a(7) =12a(8) =5a(9) =1a(10) =55a(11) =55a(12) =25a(13) =7a(14) =1a(15) =273a(16) =273a(17) =130a(18) =42a(19) =9a(20) =1a(21) =1428a(22) =1428a(23) =700a(24) =245a(25) =63a(26) =11a(27) =1a(28) =7752a(29) =7752

External references