Triangle read by rows: coefficients of Genocchi polynomials G(n,x); n times the Euler polynomials.

Terms

a(0) =1a(1) =2a(2) =-1a(3) =3a(4) =-3a(5) =0a(6) =4a(7) =-6a(8) =0a(9) =1a(10) =5a(11) =-10a(12) =0a(13) =5a(14) =0a(15) =6a(16) =-15a(17) =0a(18) =15a(19) =0a(20) =-3a(21) =7a(22) =-21a(23) =0a(24) =35a(25) =0a(26) =-21a(27) =0a(28) =8a(29) =-28