40770

Appears in sequences

• Number of unlabeled 7-gonal cacti having n polygons.at n=7A054371
• a(n) is the number of binary strings of length n such that no subsequence of length 5 or less contains 4 or more ones.at n=16A125513
• a(n) = (3/8)*(n-1)*(n-2)*(27*n^2-137*n+180).at n=9A134176
• Irregular triangle read by rows: T(n, k) = number of inequivalent (mod the dihedral group D_8 of order 8) ways to place k nonattacking knights on an n X n board.at n=41A243716
• Number of nonnegative integers with property that their base 10/3 expansion (see A024658) has n digits.at n=7A245428
• Number of (n+2) X (2+2) 0..2 arrays with every consecutive three elements in every row, column, diagonal and antidiagonal having exactly two distinct values, and new values 0 upwards introduced in row major order.at n=8A252855
• Number of (undirected) Hamiltonian paths on the first n cells of the 5 X ceiling(n/5) knight graph.at n=28A389755
• Number of (undirected) Hamiltonian paths on the first n cells of the 6 X ceiling(n/6) knight graph.at n=28A389756