Expansion of e.g.f. exp((1 - exp(-5*x))/5).

Terms

a(0) =1a(1) =1a(2) =-4a(3) =11a(4) =21a(5) =-674a(6) =6551a(7) =-33479a(8) =-174114a(9) =7478121a(10) =-117699599a(11) =1090997976a(12) =865365421a(13) =-302755297739