87719

Properties

Appears in sequences

• Numbers k such that 90*R_k + 7 is prime, where R_k = 11...1 is the repunit (A002275) of length k.at n=12A056662
• a(n) is smallest prime > 2*a(n-1), a(1) = 3.at n=14A065545
• a(1) = 1; a(n) = nextprime(2*a(n-1)) for n > 1.at n=15A110930
• Values of A167053(k)-A167053(k-1)-1 not equal to 1.at n=13A167054
• Primes of the form 3*m^2 - 4.at n=36A201716
• Number of n-bead necklaces labeled with numbers -1..1 not allowing reversal, with sum zero and three times sum of squares <= n*(1)*(1+1).at n=14A208807
• Prime numbersat n=8519