E.g.f.: exp(-Sum_{n>=1} A001227(n) * x^n).

Terms

a(0) =1a(1) =-1a(2) =-1a(3) =-7a(4) =25a(5) =-41a(6) =631a(7) =881a(8) =98897a(9) =-609265a(10) =3798991a(11) =-41799671a(12) =914146729a(13) =-15008576857a(14) =16469525255