E.g.f.: exp(Sum_{n>=1} A010815(n)*x^n/n).

Terms

a(0) =1a(1) =-1a(2) =0a(3) =2a(4) =-2a(5) =18a(6) =-128a(7) =740a(8) =-3204a(9) =-6076a(10) =210304a(11) =-1097064a(12) =-29284760a(13) =398231768a(14) =792490752a(15) =-124480674448