145749

Appears in sequences

• Number of primitive (aperiodic) palindromic structures using exactly four different symbols.at n=20A056483
• Number of primitive (period n) periodic palindromic structures using exactly four different symbols.at n=20A056521
• Number of 8-step S, E, and NW-moving king's tours on an n X n board summed over all starting positions.at n=17A187513