Triangle read by rows: T(n,k) = T(n,k-1) + T(n-1, k) + T(n-1,k-1) with T(n,0) = T(n, n) = 1 (n >= 0, 0 <= k <= n).
A336858
Triangle read by rows: T(n,k) = T(n,k-1) + T(n-1, k) + T(n-1,k-1) with T(n,0) = T(n, n) = 1 (n >= 0, 0 <= k <= n).
Terms
- a(0) =1a(1) =1a(2) =1a(3) =1a(4) =3a(5) =1a(6) =1a(7) =5a(8) =9a(9) =1a(10) =1a(11) =7a(12) =21a(13) =31a(14) =1a(15) =1a(16) =9a(17) =37a(18) =89a(19) =121a(20) =1a(21) =1a(22) =11a(23) =57a(24) =183a(25) =393a(26) =515a(27) =1a(28) =1a(29) =13
External references
- oeis: A336858