Expansion of e.g.f. exp(x^3/6 * cosh(x)).

Terms

a(0) =1a(1) =0a(2) =0a(3) =1a(4) =0a(5) =10a(6) =10a(7) =35a(8) =560a(9) =364a(10) =16800a(11) =46365a(12) =311080a(13) =4204486a(14) =9449440a(15) =257858055a(16) =1162120960a(17) =12122911480a(18) =156092547520a(19) =734926112889