Triangle T(n, k, m) = (m*(n-k) + 1)*T(n-1, k-1, m) + (m*k + 1)*T(n-1, k, m) + m*f(n,k)*T(n-2, k-1, m) with T(n, 0, m) = T(n, n, m) = 1, f(n, k) = k if k <= floor(n/2) otherwise n-k, and m = 1, read by rows.
A157207
Triangle T(n, k, m) = (m*(n-k) + 1)*T(n-1, k-1, m) + (m*k + 1)*T(n-1, k, m) + m*f(n,k)*T(n-2, k-1, m) with T(n, 0, m) = T(n, n, m) = 1, f(n, k) = k if k <= floor(n/2) otherwise n-k, and m = 1, read by rows.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =1a(4) =5a(5) =1a(6) =1a(7) =14a(8) =14a(9) =1a(10) =1a(11) =33a(12) =94a(13) =33a(14) =1a(15) =1a(16) =72a(17) =442a(18) =442a(19) =72a(20) =1a(21) =1a(22) =151a(23) =1752a(24) =3818a(25) =1752a(26) =151a(27) =1a(28) =1a(29) =310
External references
- oeis: A157207