76801

Properties

Appears in sequences

• A variant of the cuban primes: primes p = (x^3 - y^3)/(x - y) where x = y + 2.at n=27A002648
• 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=20A031610
• Primes of the form 512*k+1.at n=28A076339
• Integers k such that 10^k + 69 is a prime number.at n=20A135114
• a(n) = 48*n^2 + 1.at n=40A158638
• Primes dividing repunits R(10^n) for some n.at n=39A178070
• Smallest odd prime factor of 3^n + 1, for n > 1.at n=46A235365
• a(n) = (n^4 - n^3 + 4*n^2 + 2)/2.at n=20A239592
• Primes p such that p+2, p+4, p+6, p+8, p+10 and p+12 are all semiprime.at n=6A241483
• Primes p such that p+2, p+4, p+6, p+8, p+10 are semiprimes.at n=15A241959
• Primes p such that p = q^2 + 8*r^2 where q and r are also primes.at n=39A260556
• Triangle read by rows: T(n,k) is the number of simple graphs with n unlabeled vertices and burning number k.at n=37A263322
• Prime factors (counting multiplicity) of 10^10^10^10^2 - 1.at n=41A278835
• Primes whose square is the sum of the cubes of four primes, not necessarily distinct.at n=15A353263
• Prime numbersat n=7551