E.g.f. log(1+x)/cos(x).

Terms

a(0) =0a(1) =1a(2) =-1a(3) =5a(4) =-12a(5) =69a(6) =-285a(7) =2001a(8) =-12208a(9) =104073a(10) =-854865a(11) =8723549a(12) =-90552396a(13) =1088372557a(14) =-13647385661a(15) =190057979177