26591

Properties

Appears in sequences

• Numbers k such that 45*2^k - 1 is prime.at n=53A002242
• Prime number spiral (clockwise, Southeast spoke).at n=27A054564
• a(0)=0, a(1)=1, a(n) = smallest prime >= a(n-1) + a(n-2).at n=21A055498
• a(0)=0, a(1)=1, a(n) = smallest prime > a(n-1)+a(n-2).at n=20A055499
• Primes with 22 as smallest positive primitive root.at n=5A061334
• Apart from initial 0, same as A055498.at n=21A073021
• Each term is the smallest prime > the sum of the previous 2 terms.at n=20A073022
• Least k such that the class number of quadratic order of discriminant D=-4k equals p, where p runs through the primes.at n=43A079029
• Balanced primes of order four.at n=31A082079
• Number of 2-multiantichains of an n-set.at n=8A084869
• Primes equal to a sum of primes with differences congruent to (2,4) mod 6.at n=19A104160
• Primes p0 such that p0+p1+p2-+2 are primes; p0,p1,p2 are three consecutive primes.at n=28A158351
• Smallest primes p = p(k) with (p(k)+p(k+1)+p(k+2))/15 an integer.at n=22A168556
• Number of compositions of n where the difference between largest and smallest parts equals 3 and adjacent parts are unequal.at n=19A214272
• Floor of the solutions to c = exp(1 + n/c) for n >= 0, using recursion.at n=25A234604
• Number of nX6 0..1 arrays with every element equal to 0, 1, 2 or 4 king-move adjacent elements, with upper left element zero.at n=17A297887
• Number of nX3 0..1 arrays with every element unequal to 1, 2, 5, 6 or 8 king-move adjacent elements, with upper left element zero.at n=17A305511
• Primes of the form p+q+r where p < q < r = p+6 are consecutive primes.at n=32A309354
• First of three consecutive primes p, q, r such that p + q - r, p^2 + q^2 - r^2 and p^3 + q^3 - r^3 are all prime.at n=14A358744
• Prime numbers of the form 3p+8 where p, p+2 and p+6 are prime numbers.at n=18A376013