125744

Appears in sequences

• Number of upward triangles in a Star of David matchstick arrangement of size n.at n=29A045950
• a(n) = numerator(R(n, n, 1)), where R are the rational polynomials R(n, k, x) = Sum_{u=0..k} ( Sum_{j=0..u} x^j * binomial(u, j) * (j + 1)^n ) / (u + 1).at n=5A363000