418608

Appears in sequences

• Kekulé numbers for certain benzenoids (see the Cyvin-Gutman book for details).at n=9A123348
• a(n) = 2401*n^2 - 3822*n + 1520.at n=13A157370
• a(n) = sinh(2*arccosh(n))^2 = 4*n^2*(n^2 - 1).at n=18A173121
• a(n) = n*(n + 1)*(n + 2)*(n + 3)*(n + 4)*(n^2 - n + 6)/720.at n=14A256861