18041
domain: N
Properties
Primality
- Prime
- yes
Appears in sequences
- Prime quadruples: numbers k such that k, k+2, k+6, k+8 are all prime.at n=16A007530
- Numbers k such that the period of the continued fraction for sqrt(k) contains exactly 66 ones.at n=36A031834
- Initial terms of '4-block' primes as described in A032591.at n=26A032592
- Start of a string of exactly 3 consecutive (but disjoint) pairs of twin primes.at n=6A035791
- Number of partitions satisfying cn(0,5) < cn(2,5) + cn(3,5).at n=36A039841
- Number of nonnegative solutions of x1^2 + x2^2 + ... + x12^2 = n.at n=12A045853
- Number of digits in n-th term of A001387.at n=24A049194
- Primes setting records for earliest alphabetical position in American English.at n=10A050444
- Primes at which the difference pattern X,2,4,2,Y (X and Y >= 6) occurs in A001223.at n=7A052165
- Centered 22-gonal numbers.at n=40A069173
- Twin primes belonging to packs of three or more twin pairs.at n=45A069467
- Numbers k such that 7*(10^k - 1)/9 - 3*10^floor(k/2) is a palindromic wing prime (also known as near-repdigit palindromic prime).at n=10A077781
- Suppose p and q = p+20 are primes. Define the difference pattern of (p,q) to be the successive differences of the primes in the range p to q. There are 56 possible difference patterns, shown in the Comments line. Sequence gives smallest value of p for each difference pattern, sorted by magnitude.at n=54A079020
- Near twin primes of order 18: twin primes (p, p+2) such that p+18 and p+20 are primes.at n=29A079304
- Primes p such that p*(p-1) divides 3^(p-1)-1.at n=24A081763
- Lesser of the first pair of three successive prime pairs (no isolated primes occur in between). Least of the six successive primes which are member of prime pairs.at n=9A090953
- Lower bound twin primes such that their digital reverse is prime and a lower bound twin prime.at n=34A101783
- Positive integers of the form (18*m^2+1)/11.at n=19A113338
- Sophie Germain primes for which the reversal is also a Sophie Germain prime.at n=25A118573
- Primes appearing in partial sums of A030433 (primes ending in 9).at n=7A129081