Triangle T(n, k) = T(n-1, k) + T(n, k-1) + T(n-1, k-1) + T(n-2, k-1), with T(n, 1) = T(n, n) = 1, read by rows.
A144447
Triangle T(n, k) = T(n-1, k) + T(n, k-1) + T(n-1, k-1) + T(n-2, k-1), with T(n, 1) = T(n, n) = 1, read by rows.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =1a(4) =4a(5) =1a(6) =1a(7) =7a(8) =13a(9) =1a(10) =1a(11) =10a(12) =34a(13) =49a(14) =1a(15) =1a(16) =13a(17) =64a(18) =160a(19) =211a(20) =1a(21) =1a(22) =16a(23) =103a(24) =361a(25) =781a(26) =994a(27) =1a(28) =1a(29) =19
External references
- oeis: A144447