E.g.f.: exp(6*arcsin(x)).

Terms

a(0) =1a(1) =6a(2) =36a(3) =222a(4) =1440a(5) =9990a(6) =74880a(7) =609390a(8) =5391360a(9) =51798150a(10) =539136000a(11) =6060383550a(12) =73322496000a(13) =951480217350