Triangle T(n, k, m) = (m*(n-k) + 1)*T(n-1, k-1, m) + (m*k + 1)*T(n-1, k, m) + m*k*(n-k)*T(n-2, k-1, m) with T(n, 0, m) = T(n, n, m) = 1 and m = 3, read by rows.

A157149

Triangle T(n, k, m) = (m*(n-k) + 1)*T(n-1, k-1, m) + (m*k + 1)*T(n-1, k, m) + m*k*(n-k)*T(n-2, k-1, m) with T(n, 0, m) = T(n, n, m) = 1 and m = 3, read by rows.

Terms

    a(0) =1a(1) =1a(2) =1a(3) =1a(4) =11a(5) =1a(6) =1a(7) =57a(8) =57a(9) =1a(10) =1a(11) =247a(12) =930a(13) =247a(14) =1a(15) =1a(16) =1013a(17) =10006a(18) =10006a(19) =1013a(20) =1a(21) =1a(22) =4083a(23) =89139a(24) =225230a(25) =89139a(26) =4083a(27) =1a(28) =1a(29) =16369

External references