402604224

Appears in sequences

• Nonnegative integers n such that n^2*(n+1)*(2*n+1)^2*(7*n+1)/36 is a square.at n=15A007750
• Odd bisection of A007750.at n=7A007752
• Numbers k such that both k+1 and 7k+1 are squares.at n=7A195917