Expansion of e.g.f. (1/2)*(x^2*exp(x))*(sinh(x))^2.

Terms

a(0) =0a(1) =0a(2) =0a(3) =0a(4) =12a(5) =60a(6) =300a(7) =1260a(8) =5096a(9) =19656a(10) =73800a(11) =270600a(12) =974292a(13) =3454308a(14) =12090260a(15) =41850900a(16) =143489040a(17) =487862736a(18) =1646537040a(19) =5520741840a(20) =18402473180a(21) =61018726860a(22) =201361799100a(23) =661617339900