699030226

Appears in sequences

• Number of 1-punctured staircase polygons (by perimeter) with a hole of perimeter 4.at n=20A055022
• a(n) = Sum_{k=0..12} binomial(n,k).at n=33A219615
• a(n) = Sum_{k=0..n} binomial(3*n-3,k).at n=12A385823