-3153

Appears in sequences

• Values of n such that L(7) and N(7) 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=40A226927
• Expansion of Sum_{k>=1} x^k/(1 + x^k)^4.at n=23A320901