74209

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 36.at n=7A031624
• Third term of weak prime sextet: p(m-1)-p(m-2) < p(m)-p(m-1) < p(m+1)-p(m) < p(m+2)-p(m+1) < p(m+3)-p(m+2).at n=26A054830
• Scale factor by which primitive Pythagorean triangle {x=A088509(n), y=A088510(n), z=A088511(n)} needs be enlarged in order to circumscribe the smallest integral square having a side on the hypotenuse.at n=31A088544
• Primes p such that the decimal expansion of p remains prime under two iterations of base-10 to base-2 conversions.at n=21A123266
• Primes of the form x^2 + 18480*y^2.at n=13A173274
• Odd primes p with the property that gcd(ord_p q: prime q divides p-1) = 1.at n=28A295975
• Primes p such that A001175(p) = (p-1)/8.at n=21A308793
• Prime numbersat n=7323