117620

Appears in sequences

• Numbers k such that 2*prime(k)+1, 2*prime(k+1)+1 and 2*prime(k+2)-1 are also consecutive primes.at n=20A103851
• G.f.: 1/(1-(2*x^2+x^3)*(1-sqrt(1-4*x))).at n=13A234276
• Expansion of Product_{k>=1} ((1 + x^k)/(1 - x^k))^(sigma_0(k)).at n=18A301554
• Expansion of (-1 + Product_{k>=1} 1 / (1 + (-x)^k))^5.at n=28A341244