a(n) = hypergeometric([n, -n], [], -1).

A278070

a(n) = hypergeometric([n, -n], [], -1).

Terms

    a(0) =1a(1) =2a(2) =11a(3) =106a(4) =1457a(5) =25946a(6) =566827a(7) =14665106a(8) =438351041a(9) =14862109042a(10) =563501581931

External references