Expansion of e.g.f. exp( (sinh(x) + x*cosh(x)) / 2 ).

Terms

a(0) =1a(1) =1a(2) =1a(3) =3a(4) =9a(5) =24a(6) =99a(7) =418a(8) =1769a(9) =9320a(10) =49541a(11) =278912a(12) =1764825a(13) =11319784a(14) =77850287a(15) =570610472a(16) =4290387409a(17) =34316005632a(18) =285335249065