286606

Appears in sequences

• Congruence classes of triangles which can be drawn using lattice points in n X n grid as vertices.at n=35A028419
• Number of 1-sided triangular polyedges with n cells.at n=7A151539
• Solution of the complementary equation a(n) = a(n-1) + a(n-2) + b(n-1) + n - 1, where a(0) = 1, a(1) = 2, b(0) = 3, and (a(n)) and (b(n)) are increasing complementary sequences.at n=22A294548