82297

Appears in sequences

• Number of n X n permutation matrices in which the sums of the entries of each NorthEast-SouthWest diagonal are 0 or 1.at n=10A099152
• Number of ways to write n as an ordered sum of 1's, 2's and 3's such that no 2 precedes any 1.at n=28A124062
• Triangle read by rows: T(n,k) is the number of permutations p of {1,2,...,n} such that the set {p(i)-i, i=1,2,...,n} has exactly k elements (1<=k<=n).at n=54A125182