Triangle, read by rows, of Lambert's numerator polynomials related to convergents of tan(x).

Terms

a(0) =1a(1) =3a(2) =0a(3) =15a(4) =0a(5) =-1a(6) =105a(7) =0a(8) =-10a(9) =0a(10) =945a(11) =0a(12) =-105a(13) =0a(14) =1a(15) =10395a(16) =0a(17) =-1260a(18) =0a(19) =21a(20) =0a(21) =135135a(22) =0a(23) =-17325a(24) =0a(25) =378a(26) =0a(27) =-1a(28) =2027025a(29) =0