a(n) = floor(Gamma(n + 7/11)/Gamma(7/11)).

Terms

a(0) =1a(1) =0a(2) =1a(3) =2a(4) =9a(5) =46a(6) =260a(7) =1731a(8) =13220a(9) =114177a(10) =1100259a(11) =11702761a(12) =136177584a(13) =1720789475a(14) =23465311032a(15) =343446825119