138909

Appears in sequences

• Number of ways to place 3 nonattacking bishops on a 3 X n board.at n=32A172207
• Number of vertices in truncated tetrahedron with faces that are centered polygons.at n=28A193218
• a(n) = Sum_{k=0..n} binomial(n,k)^3 * 2^k.at n=6A206178
• Square array T(n,k), n >= 0, k >= 0, read by antidiagonals, where T(n,k) = Sum_{j=0..n} k^j * binomial(n,j)^3.at n=42A336163
• Square array T(n,k), n >= 0, k >= 0, read by antidiagonals, where T(n,k) = Sum_{j=0..n} 2^j * binomial(n,j)^k.at n=51A336203