Expansion of e.g.f. exp(t*x)/(1 - x^2/t^2 - t^3* x^3).

Terms

a(0) =1a(1) =0a(2) =0a(3) =1a(4) =2a(5) =0a(6) =0a(7) =0a(8) =1a(9) =0a(10) =0a(11) =6a(12) =0a(13) =0a(14) =0a(15) =7a(16) =24a(17) =0a(18) =0a(19) =0a(20) =12a(21) =0a(22) =0a(23) =0a(24) =25a(25) =0a(26) =0a(27) =120a(28) =0a(29) =0