-2501

Appears in sequences

• Numerator in fraction A180878/A060818.at n=12A180878
• Values of n such that L(15) and N(15) are both prime, where L(k) = (n^2+n+1)*2^(2*k) + (2*n+1)*2^k + 1, N(k) = (n^2+n+1)*2^k + n.at n=31A227518