1049201

Properties

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 81.at n=24A031669
• 55 'Reverse and Add' steps are needed to reach a palindrome.at n=12A065322
• Primes of the form x^4 + y^4 with x^2 + y^2 and x+y also prime.at n=30A100268
• Primes of the form 4^x + y^4 with x, y > 0.at n=33A250717
• Primes of the form 5^x + y^5 with x, y > 0.at n=8A250842
• a(n) = Sum_{k=1..n} 2^(floor(n/k) - 1).at n=20A345028
• a(n) = Sum_{p|n, p prime} p^phi(n/p).at n=49A369687
• Prime numbersat n=82076