78481

Appears in sequences

• Numbers k such that the continued fraction for sqrt(k) has odd period and if the last term of the periodic part is deleted the two central terms are both 62.at n=1A031650
• Expansion of 1/(1 - x - x^2 - x^3 + x^6 + x^7).at n=20A260917
• Numbers k such that -3 is a quadratic residue (not necessarily coprime) modulo k, k + 1, k + 2 and k + 3.at n=46A318527
• Semiprimes k such that k+1, k+2, 2*k+1 and 2*k+3 are also semiprimes.at n=7A362200