22073

Properties

Appears in sequences

• Numbers k such that the continued fraction for sqrt(k) has period 93.at n=20A020432
• 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 22.at n=5A031610
• Numbers n such that the sum of the primes <= n is a square.at n=1A033998
• a(n) = least number not of form [ (a^2/n) ] + [ (b^2)/n ].at n=25A036575
• Trajectory of 20 under prime factor concatenation procedure.at n=20A037926
• Primes p = prime(k) such that prime(k) + prime(k+7) = prime(k+1) + prime(k+6) = prime(k+2) + prime(k+5) = prime(k+3) + prime(k+4).at n=10A064102
• Primes of the form 16*m^2 + 169, m=1,2,3,...at n=13A087862
• Numbers p such that p = (prime(n)+ prime(n+2))/2 is prime for prime indices n=2, 3, 5...at n=24A098038
• Egyptian fraction representation for the cube root of 44.at n=2A132519
• Primes p such that p - 6^2, p - 6, p + 6 and p + 6^2 are also primes.at n=40A141279
• Prime numbers q of primitive Pythagorean triangles such that perimeters are averages of twin prime pairs, p+1=q(prime), a=q^2-p^2, c=q^2+p^2, b=2*p*q, ar=a*b/2; s=a+b+c, s-+1 are primes.at n=35A155187
• Number of parts that are visible in one of the three views of the shell model of partitions version "Tree" with n shells.at n=33A194803
• Primes equal to the sum of both two and three successive semiprimes.at n=19A255897
• Indices of primes in A027998.at n=30A285224
• Balanced primes of order fourteen.at n=2A300365
• Primes p such that the base-10 concatenations (p+1)||p and (p+1)||(p+1)||p are both prime.at n=43A309749
• Prime numbersat n=2474