G.f.: A(x) = exp( Sum_{n>=1} A162552(n) * 2*A006519(n) * x^n/n ).

Terms

a(0) =1a(1) =2a(2) =0a(3) =-2a(4) =6a(5) =12a(6) =0a(7) =-8a(8) =24a(9) =44a(10) =0a(11) =-30a(12) =54a(13) =104a(14) =0a(15) =-60a(16) =238a(17) =466a(18) =0a(19) =-402a(20) =924a(21) =1892a(22) =0a(23) =-1228a(24) =3264a(25) =6006a(26) =0a(27) =-4052a(28) =6688a(29) =13052