141408

Appears in sequences

• Number of 4-step one or two collinear space at a time queen's tours on an n X n board summed over all starting positions.at n=8A187029
• Number of 8-step self-avoiding walks on an n X n square summed over all starting positions.at n=10A188153
• a(n) is the least number k such that the equation phi(x) = k has exactly n solutions and the arithmetic mean of these solutions is an integer, or -1 if no such number exists.at n=35A389860