270841

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 49.at n=11A031637
• a(n) = a(n-1) + a(n-2) + 2 a(ceiling(n/2)), where a(0) = 1, a(1) = 1, a(2) = 1.at n=23A298350
• Primes p such that gcd(ord_p(2), ord_p(6)) = 1.at n=6A383467
• Prime numbersat n=23716