Real part of g.f. C(x) that satisfies: C(x) = 1 + x*C(I*x)^2.

Terms

a(0) =1a(1) =1a(2) =0a(3) =-1a(4) =-4a(5) =-14a(6) =8a(7) =35a(8) =44a(9) =246a(10) =168a(11) =-1906a(12) =296a(13) =-5692a(14) =-19440a(15) =89539a(16) =-104836a(17) =110062a(18) =946856a(19) =-3306758a(20) =8516696a(21) =3998844a(22) =-36402256a(23) =82221230a(24) =-492938376a(25) =-657397540a(26) =1092399120a(27) =553666748a(28) =22487269712a(29) =48307873544