179520

Appears in sequences

• The sequence A006863 (shifted by one) seems to be counting the periodic points for a map. If so, then this is the sequence of the numbers of orbits of length n.at n=23A060334
• 1/4 of the number of 4-colorings of a planar n X n X n triangular grid.at n=5A153467
• Number of 5 X n 0..1 arrays avoiding 0 0 0 and 1 1 1 horizontally and 0 0 1 and 0 1 1 vertically.at n=7A208070