172143

Appears in sequences

• Number of n X 4 binary arrays with a path of adjacent 1's from upper left corner to anywhere in right hand column.at n=3A069295
• Number of 5 X n binary arrays with a path of adjacent 1's from upper left corner to anywhere in right hand column.at n=2A069309
• Number of nX6 arrays of the minimum value of corresponding elements and their horizontal, vertical or antidiagonal neighbors in a random, but sorted with lexicographically nondecreasing rows and nonincreasing columns, 0..3 nX6 array.at n=3A220008
• T(n,k)=Number of nXk arrays of the minimum value of corresponding elements and their horizontal, vertical or antidiagonal neighbors in a random, but sorted with lexicographically nondecreasing rows and nonincreasing columns, 0..3 nXk array.at n=39A220010
• Number of 4Xn arrays of the minimum value of corresponding elements and their horizontal, vertical or antidiagonal neighbors in a random, but sorted with lexicographically nondecreasing rows and nonincreasing columns, 0..3 4Xn array.at n=5A220013
• Draw a regular n-gon and the enclosing circle, then for each pair of vertices X, Y, draw a circle with diameter XY; the union of these figures is the graph H_n; sequence gives number of regions in H_n.at n=33A370978