1456250

Appears in sequences

• Kekulé numbers for certain benzenoids.at n=5A114480
• Number of zig-zag paths from top to bottom of a rectangle of width 9 with n rows whose color is not that of the top right corner.at n=20A153364
• Number of zig-zag paths from top to bottom of a rectangle of width 9 with 2n-1 rows whose color is not that of the top right corner.at n=10A153367