574464

Appears in sequences

• Number of (n+1) X (n+1) 0..2 arrays with every 2 X 3 or 3 X 2 subblock having exactly one clockwise edge increases.at n=9A207042
• G.f.: x^2 * f''(x), where f(x) = Product_{k>=1} (1 + x^k).at n=34A278407