Expansion of e.g.f. (1 + sinh(x)) / cos(x).

Terms

a(0) =1a(1) =1a(2) =1a(3) =4a(4) =5a(5) =36a(6) =61a(7) =624a(8) =1385a(9) =18256a(10) =50521a(11) =814144a(12) =2702765a(13) =51475776a(14) =199360981a(15) =4381112064a(16) =19391512145a(17) =482962852096