Triangle T(n, k) = binomial((k+1)*(n-k+1), n+2) with T(0, 0) = 2, T(n, 0) = T(n, n) = 1, read by rows.
A155869
Triangle T(n, k) = binomial((k+1)*(n-k+1), n+2) with T(0, 0) = 2, T(n, 0) = T(n, n) = 1, read by rows.
Terms
- a(0) =2a(1) =1a(2) =1a(3) =1a(4) =1a(5) =1a(6) =1a(7) =6a(8) =6a(9) =1a(10) =1a(11) =28a(12) =84a(13) =28a(14) =1a(15) =1a(16) =120a(17) =792a(18) =792a(19) =120a(20) =1a(21) =1a(22) =495a(23) =6435a(24) =12870a(25) =6435a(26) =495a(27) =1a(28) =1a(29) =2002
External references
- oeis: A155869