282948

Appears in sequences

• Partial sums of A051880.at n=14A050406
• Numbers k such that 2*R_k - 1 is prime, where R_k = 11...1 is the repunit (A002275) of length k.at n=11A084832
• a(n) = n*(n-1)*(2*n+1)*(2*n-1)*(2*n-3)*(10*n-17)/90.at n=9A185375