68981

Appears in sequences

• Sum of the elements in the primitive subsets of the integers 1 to n.at n=16A087078
• Number of conjugate-congruent partitions of n.at n=51A137438
• Number of (4+1) X (n+1) 0..1 arrays with every 2 X 2 subblock ne-sw antidiagonal difference nondecreasing horizontally and nw+se diagonal sum nondecreasing vertically.at n=32A258557
• Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 547", based on the 5-celled von Neumann neighborhood.at n=40A272840