80737

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 63.at n=2A031651
• Primes of the form 16*m^2 + 81, m=1,2,3,...at n=13A087861
• Primes of the form 6*k^2 + 1.at n=29A090687
• Primes p of Erdos-Selfridge class 5+ with largest prime factor of p+1 not of class 4+.at n=19A129473
• Primes of the form n^2 + 81.at n=26A256775
• Prime numbersat n=7901