Triangle T(n, k) = (2*k/(k+1))*binomial(n-1, k)*binomial(n+1, k) with T(n, 0) = T(n, n) = 1, read by rows.
A174117
Triangle T(n, k) = (2*k/(k+1))*binomial(n-1, k)*binomial(n+1, k) with T(n, 0) = T(n, n) = 1, read by rows.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =1a(4) =3a(5) =1a(6) =1a(7) =8a(8) =8a(9) =1a(10) =1a(11) =15a(12) =40a(13) =15a(14) =1a(15) =1a(16) =24a(17) =120a(18) =120a(19) =24a(20) =1a(21) =1a(22) =35a(23) =280a(24) =525a(25) =280a(26) =35a(27) =1a(28) =1a(29) =48
External references
- oeis: A174117