a(n) = n^n*GegenbauerC(n,-n,-1/n)/(n+1).

A272869

a(n) = n^n*GegenbauerC(n,-n,-1/n)/(n+1).

Terms

    a(0) =1a(1) =4a(2) =29a(3) =464a(4) =6922a(5) =202432a(6) =4630173a(7) =198818048a(8) =6154090622a(9) =349818973184

External references