26647

Properties

Appears in sequences

• Numbers k such that the period of the continued fraction for sqrt(k) contains exactly 80 ones.at n=34A031848
• Denominators of continued fraction convergents to sqrt(407).at n=7A041773
• Primes p such that p+-2 and p+-3 are not squarefree.at n=12A153214
• Primes of the form 2n^2+18n+7, n>=0.at n=14A154592
• Primes of the form 5*k^2 + 2, k >= 0.at n=13A201481
• Primes of the form 6*p + 1 with p prime that are also of the form x^2 + 27*y^2 and congruent to 7 mod 24.at n=29A256172
• Odd primes p for which there are exactly as many primes in the range [prevprime(p)^2, prevprime(p)*p] as there are in the range [prevprime(p)*p, p^2], where prevprime(p) gives the previous prime before prime p.at n=32A256473
• Number of (n+2) X (2+2) 0..1 arrays with each 3 X 3 subblock having clockwise perimeter pattern 00000001 or 00000101.at n=10A259766
• Primes p such that prime(p)^2 - 2 = prime(q) for some prime q.at n=27A261354
• Primes having only {2, 4, 6, 7} as digits.at n=36A386155
• Prime numbersat n=2922