221400

Appears in sequences

• Column 2 of triangle A118032, where column 2 of the matrix square of A118032 forms a bisection of this sequence.at n=22A118035
• Column 2 of triangle A118040, which is the matrix square of triangle A118032; also equals a bisection of A118035, which is column 2 of A118032.at n=11A118043
• Numbers with prime factorization pq^2r^3s^3.at n=30A190320
• Triangle read by rows, T(n,k) for 0<=k<=n, generalizing A098742.at n=46A216916