224939

Appears in sequences

• Numbers k such that the period of the continued fraction for sqrt(k) contains exactly 85 ones.at n=17A031853
• Numbers of the form (11^i)*(13^j).at n=17A108090
• Numbers k such that both k and sigma(k)=A000203(k) are powerful, i.e., are terms of A001694.at n=9A337044
• Indecomposable sigma-powerful numbers: powerful numbers k such that sigma(k) is also powerful, but restricted to terms that are not the product of 2 terms > 1 of A337044.at n=5A337045
• a(n) = A329044(n) / gcd(n, A329044(n)).at n=54A345943