19483

Properties

Appears in sequences

• Powers of fourth root of 8 rounded down.at n=19A018066
• Numerators of continued fraction convergents to sqrt(753).at n=8A042450
• Third member of a sexy prime quadruple: value of p+12 such that p, p+6, p+12 and p+18 are all prime.at n=34A046123
• Primes p from A031924 such that A052180(primepi(p)) = 13.at n=31A052233
• Third term of balanced prime quartets: p(m-1)-p(m-2) = p(m)-p(m-1) = p(m+1)-p(m).at n=14A054802
• Primes in the sequence A003294 of certain fourth powers bases.at n=13A134820
• Primes congruent to 32 mod 53.at n=39A142562
• Primes congruent to 13 mod 59.at n=39A142740
• Primes congruent to 24 mod 61.at n=34A142822
• Number of arrangements of n+2 numbers in 0..2 with each number being the sum mod 3 of two others.at n=6A183877
• T(n,k)=Number of arrangements of n+2 numbers in 0..k with each number being the sum mod (k+1) of two others.at n=34A183884
• Number of arrangements of n+3 numbers in 0..2 with each number being the sum mod 3 of three others.at n=5A183885
• T(n,k)=Number of arrangements of n+3 numbers in 0..k with each number being the sum mod (k+1) of three others.at n=26A183892
• First of a run of 4 or more consecutive primes which all equal 1 (mod 3).at n=44A185942
• Numbers k such that 3^k + 22 is prime.at n=22A219042
• Primes whose binary and ternary representations are also prime when read in decimal.at n=29A236537
• Primes p such that p^4 - p +/- 1 are twin primes.at n=16A236952
• 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=28A256473
• a(n) = Sum_{k=1..n} (k/gcd(n, k))^2.at n=45A332654
• Primes in A374965 sorted into increasing order.at n=37A373804