8239770

Appears in sequences

• a(n + 3) = 35*a(n + 2) - 35*a(n + 1) + a(n), with a(0) = 0, a(1) = 6, a(2) = 210.at n=5A029549
• a(n) = n*(n^2 - 1)*(n + 2)*(n^2 + 4*n + 6)/72.at n=28A054563
• Triangular numbers whose largest proper divisor is also triangular.at n=9A076170
• Duplicate of A029549.at n=5A076715
• Sum of the areas of the first n+1 Pell triangles.at n=10A096979
• Triangular numbers representable as x!/y! with y < x-1.at n=8A227027