83666

Appears in sequences

• Numbers k such that k^2 contains only digits {5,6,9}.at n=5A053970
• Recurrence sequence based on positions of digits in decimal places of Catalan's constant, G (often also called K).at n=9A098322
• Numbers k such that k and k^2 use only the digits 3, 5, 6, 8 and 9.at n=9A137134
• Let p = n-th prime == 3 mod 8; a(n) = sum of quadratic residues mod p that are < p/2.at n=46A282721
• G.f.: Sum_{n>=0} (n+1) * x^n * (1 + x^n)^n / (1 + x^(n+1))^(n+2).at n=54A326285