131316

Appears in sequences

• Number of prime alternating tangles (or knots) of type Gamma_1 with two connected components.at n=11A067644
• Count of interior bounded regions in a regular 2n-sided polygon dissected by all diagonals parallel to sides.at n=28A165217
• Number of strictly increasing arrangements of 5 nonzero numbers in -(n+3)..(n+3) with sum zero.at n=34A188124