Expansion of exp( arcsinh( -2*x ) ) in powers of x.

Terms

a(0) =1a(1) =-2a(2) =2a(3) =0a(4) =-2a(5) =0a(6) =4a(7) =0a(8) =-10a(9) =0a(10) =28a(11) =0a(12) =-84a(13) =0a(14) =264a(15) =0a(16) =-858a(17) =0a(18) =2860a(19) =0a(20) =-9724a(21) =0a(22) =33592a(23) =0a(24) =-117572a(25) =0a(26) =416024a(27) =0a(28) =-1485800a(29) =0