163456

Appears in sequences

• Third binomial transform of A010685 (period 2: repeat 1,4).at n=8A080960
• a(n) = (n + 1)^2*(5*n^2 + 10*n + 2)/2.at n=15A269237
• Heptagonal numbers (A000566) in which parity of digits alternates.at n=25A297646