19471

Properties

Appears in sequences

• Expansion of 1/(1-x^5-x^6-x^7-x^8-x^9-x^10).at n=47A017841
• Primes p such that p, p+6, p+12, p+18 are all primes.at n=34A023271
• Primes that remain prime through 3 iterations of function f(x) = 6x + 1.at n=16A023287
• Initial prime in set of 4 consecutive primes with common difference 6.at n=14A033451
• Numbers whose base-4 representation contains exactly four 0's and three 3's.at n=25A045084
• Prime number spiral (clockwise, Northwest spoke).at n=23A053999
• a(n) is the smallest start of a run of exactly n+1 consecutive primes with n (not necessarily equal) prime differences, each divisible by 6.at n=5A054203
• First of n consecutive primes which differ by a multiple of 6.at n=6A054679
• First term of balanced prime quartets: p(m+1)-p(m) = p(m+2)-p(m+1) = p(m+3)-p(m+2).at n=14A054800
• First prime starting a chain of exactly n consecutive primes congruent to 1 modulo 6.at n=6A055625
• Initial prime in first sequence of n consecutive primes congruent to 1 modulo 6.at n=6A057620
• Primes p such that x^59 = 2 has no solution mod p.at n=35A059312
• Primes p such that p, p+6, p+12, p+18 are consecutive primes and p = 6*k+1 for some k.at n=6A090837
• Prime(p^2) where p = prime(n).at n=14A096327
• Primes congruent to 12 mod 61.at n=39A142810
• Primes p such that the multiplicative order of 2 modulo p is (p-1)/10.at n=31A152310
• A156977/3.at n=31A164565
• Primes p such that (p+18), (p+36) and (p+72) are also prime.at n=23A175158
• First of a run of 4 or more consecutive primes which all equal 1 (mod 3).at n=42A185942
• Number of nonempty subsets of {1, 2, ..., n} with <=6 pairwise coprime elements.at n=29A187267