E.g.f. exp(x)*(Bessel_I(2,2*x) - Bessel_I(3,2*x) + Bessel_I(4,2*x)).

Terms

a(0) =0a(1) =0a(2) =1a(3) =2a(4) =7a(5) =20a(6) =61a(7) =182a(8) =546a(9) =1632a(10) =4875a(11) =14542a(12) =43340a(13) =129064a(14) =384111a(15) =1142610a(16) =3397656a(17) =10100448a(18) =30020283a(19) =89213094a(20) =265096455a(21) =787695636a(22) =2340488535a(23) =6954401762a(24) =20664628438a(25) =61406952800a(26) =182488572045a(27) =542358944946