Triangular array of generalized Narayana numbers: T(n, k) = 4*binomial(n+1, k+3)*binomial(n+1, k-1)/(n+1).

A145598

Triangular array of generalized Narayana numbers: T(n, k) = 4*binomial(n+1, k+3)*binomial(n+1, k-1)/(n+1).

Terms

    a(0) =1a(1) =4a(2) =4a(3) =10a(4) =24a(5) =10a(6) =20a(7) =84a(8) =84a(9) =20a(10) =35a(11) =224a(12) =392a(13) =224a(14) =35a(15) =56a(16) =504a(17) =1344a(18) =1344a(19) =504a(20) =56a(21) =84a(22) =1008a(23) =3780a(24) =5760a(25) =3780a(26) =1008a(27) =84a(28) =120a(29) =1848

External references