Triangular sequence of coefficients from the expansion of p(x,t)=Cos(x*t)/Cos(t).

Terms

a(0) =1a(1) =0a(2) =1a(3) =0a(4) =-1a(5) =0a(6) =5a(7) =0a(8) =-6a(9) =0a(10) =1a(11) =0a(12) =61a(13) =0a(14) =-75a(15) =0a(16) =15a(17) =0a(18) =-1a(19) =0a(20) =1385a(21) =0a(22) =-1708a(23) =0a(24) =350a(25) =0a(26) =-28a(27) =0a(28) =1a(29) =0