27352

Appears in sequences

• Number of polynomials of degree n over GF(2) in which the degrees of all irreducible factors are distinct.at n=16A007839
• Related to enumeration of edge-rooted catafusenes.at n=8A039919
• Triangle read by rows: row n is the first row of the matrix M[n]^(n-1), where M[n] is the n X n tridiagonal matrix with main diagonal (2,3,3,...) and super- and subdiagonals (1,1,1,...).at n=37A124733
• Number of ways to place 4 nonattacking knights on a 4 X n board.at n=8A172213
• Triangle read by rows: T(n,k) is the number of partitions of the set {1,2,...,n} having k adjacent blocks of size 2, i.e., blocks of the form (i,i+1) (0 <= k <= floor(n/2)).at n=31A184174
• Triangle T(n,k), n>=0, 0<=k<=C(n,2), read by rows: T(n,k) = number of k-length saturated chains in the poset of Dyck paths of semilength n ordered by inclusion.at n=32A193536
• Number of 6-cycles in the n X n knight graph.at n=17A289181