T(n, k) = binomial(n - k - 1, k)*binomial(2*n - 2*k, n)/(n + 1), for n >= 1 and 0 <= k <= floor((n - 1)/2), triangle read by rows.
A319120
T(n, k) = binomial(n - k - 1, k)*binomial(2*n - 2*k, n)/(n + 1), for n >= 1 and 0 <= k <= floor((n - 1)/2), triangle read by rows.
Terms
- a(0) =1a(1) =2a(2) =5a(3) =1a(4) =14a(5) =6a(6) =42a(7) =28a(8) =1a(9) =132a(10) =120a(11) =12a(12) =429a(13) =495a(14) =90a(15) =1a(16) =1430a(17) =2002a(18) =550a(19) =20a(20) =4862a(21) =8008a(22) =3003a(23) =220a(24) =1a(25) =16796a(26) =31824a(27) =15288a(28) =1820a(29) =30
External references
- oeis: A319120