33068

Appears in sequences

• Numbers k such that 4*10^k + 3*R_k is prime, where R_k = 11...1 is the repunit (A002275) of length k.at n=20A056707
• Number of regions formed inside square by diagonals and the segments joining the vertices to the points dividing the sides into n equal length segments.at n=43A108914
• Number of ways to place 4 nonattacking nightriders on a 4 X n board.at n=9A172219