590848

Appears in sequences

• Triangle read by rows, giving Kekulé numbers for certain benzenoids (see the Cyvin-Gutman book for details).at n=52A123354
• Kekulé numbers for certain benzenoids (see the Cyvin-Gutman book for details).at n=7A123357
• Number of n X 4 0..2 arrays with no element equal to any value at offset (-2,-2) (-1,-2) or (0,-1) and new values introduced in order 0..2.at n=7A275138