233920

Appears in sequences

• a(n) = (2*n+1)*(3*n+1)*(4*n+1).at n=21A033591
• Palindromic numbers in bases 3 and 7 written in base 10.at n=22A259377
• Number of one-to-one functions f from [n] to [2n] where f(x) may not be equal to x or to 2n+1-x.at n=6A272261