[ exp(17/19)*n! ].

Terms

a(0) =2a(1) =4a(2) =14a(3) =58a(4) =293a(5) =1761a(6) =12331a(7) =98650a(8) =887855a(9) =8878555a(10) =97664108a(11) =1171969305a(12) =15235600969a(13) =213298413570