102949

Appears in sequences

• Number of ways to cover (without overlapping) a ring lattice (necklace) of n sites with molecules that are 6 sites wide.at n=45A058367
• Numbers k such that sigma(k) and phi(k) are both triangular numbers.at n=11A113930
• Expansion of 1/(1-x*(1-6*x)).at n=15A145934
• Positive numbers k such that -k, -(k + 1), -(k + 2), and -(k + 3) are 4 consecutive negative negabinary-Niven numbers (A331728).at n=31A331825