a(n) = C(n)*(C(n)-1)*(C(n)-2)/6, where C(n) are the Catalan numbers (A000108).
A051790
a(n) = C(n)*(C(n)-1)*(C(n)-2)/6, where C(n) are the Catalan numbers (A000108).
Terms
- a(0) =0a(1) =0a(2) =0a(3) =10a(4) =364a(5) =11480a(6) =374660a(7) =13067054a(8) =486345860a(9) =19143687420a(10) =789566607180
External references
- oeis: A051790