[ exp(1/5)*n! ].

Terms

a(0) =1a(1) =2a(2) =7a(3) =29a(4) =146a(5) =879a(6) =6155a(7) =49246a(8) =443222a(9) =4432226a(10) =48754489a(11) =585053875a(12) =7605700380a(13) =106479805323