111645

Appears in sequences

• Number of monotone Boolean functions of n variables with 2 mincuts. Also number of Sperner systems with 2 blocks.at n=7A016269
• Half the number of n X 9 binary arrays with a path of adjacent 1's and a path of adjacent 0's from top row to bottom row.at n=1A069409
• Triangle read by rows: matrix product of the Stirling numbers of the second kind with the binomial coefficients.at n=52A126351
• Triangle read by rows: T(n,k) = number of forests of k labeled rooted trees of height at most 1, with n labels, where any root may contain >= 1 labels, n >= 0, 0 <= k <= n.at n=47A143395
• Triangle read by rows: 2-Stirling numbers of the second kind.at n=47A143494
• a(n) = (2*n - 1)*(24*n^2 - 42*n + 19).at n=13A160174
• The function W_n(6) (see Borwein et al. reference for definition).at n=26A169711
• Triangle read by rows: T(n,k) is the number of permutations of {1,2,...,n} having k up-down runs (1 <= k <= n).at n=41A186370
• Square array A(n, k) = ((k+2)^(n+2) - 2 * (k+1)^(n+2) + k^(n+2))/2 for k, n >= 0 read by ascending antidiagonals.at n=47A372118
• Triangle read by rows: T(n, k) = number of k-element subobjects of an n-element set in the category of relations, n >= 0, 0 <= k <= n.at n=47A373398