181782

Appears in sequences

• Expansion of Product_{k>=1} (1 + 2*x^k)/(1 - x^k).at n=25A264686
• Table read by downward antidiagonals: T(n,k) is the number of tilings of the n X k torus up to horizontal and vertical reflections by a tile that is fixed under horizontal reflections but not vertical reflections.at n=39A368302