216528

Appears in sequences

• The number of unlabeled graphs on n nodes with degree of 1 or 2.at n=41A186417
• Number of length-n 0..5 arrays with no repeated value differing from the previous repeated value by other than plus two or minus 1.at n=6A269637
• Number of length-7 0..n arrays with no repeated value differing from the previous repeated value by other than plus two or minus 1.at n=4A269644