19681

Properties

Appears in sequences

• Primes of the form 3^k - 2.at n=4A014232
• Upper prime of a record difference between it and the second prime before it.at n=16A031134
• 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 31.at n=2A031619
• Numbers k such that the period of the continued fraction for sqrt(k) contains exactly 74 ones.at n=24A031842
• Primes of the form p^k - p + 1 for prime p.at n=17A034915
• Primes of the form n^3 - 2.at n=3A038600
• Least prime in A031924 (lesser of 6-twins) such that the distance to the next 6-twin is 2*n.at n=33A052352
• Primes p of form q^k-2 where q is also a prime and k > 1.at n=24A053705
• Consider all integer triples (i,j,k), j,k>0, with binomial(i+2, 3) = binomial(j+2, 3) + k^3, ordered by increasing i; sequence gives j values.at n=44A054222
• a(n) = 3^n - 2.at n=8A058481
• Smallest prime p such that x = n is a solution mod p of x^3 = 2, or 0 if no such prime exists.at n=25A059940
• Centered 24-gonal numbers.at n=40A069190
• Largest prime < n^3.at n=25A077037
• Largest prime factor of 3^n-2.at n=7A080798
• Smallest prime which occurs exactly n times in the sequence A086527.at n=22A086528
• Primes of the form 16*m^2 + 81, m=1,2,3,...at n=8A087861
• Primes p such that the sum of the digits of p is not prime, but the sum of the cubes of the digits of p is prime.at n=34A091365
• Primes that are 2 less than a perfect power m^k, k >= 2.at n=38A094786
• Smallest prime of the form k^n-2.at n=8A095304
• Largest prime <= 3^n.at n=8A104088