26227

Properties

Appears in sequences

• Cuban primes: primes which are the difference of two consecutive cubes.at n=40A002407
• Primes that remain prime through 3 iterations of function f(x) = 2x + 3.at n=35A023273
• Discriminants of imaginary quadratic fields with class number 19 (negated).at n=41A046016
• Numbers n such that 99*2^n-1 is prime.at n=32A050575
• Numbers which are primes and which remain prime for three successive applications of incrementing each digit by 2 with carries ignored.at n=28A088787
• Number of isomorphism classes of linking pairings on finite Abelian 2-groups of fixed order 2^n.at n=22A122555
• Hex (or centered hexagonal) numbers that are prime powers of the form (6n+1)^k.at n=41A133323
• Smallest of 3 consecutive prime numbers such that p1*p2*p3*d1*d2=average of twin prime pairs; p1,p2,p3 consecutive prime numbers; d1(delta)=p2-p1, d2(delta)=p3-p2.at n=21A153409
• Number of 3D matrices with positive integer entries such that sum of all entries equals n.at n=12A159297
• Primes p such that q*p +- (p mod q) are primes, for q=8.at n=30A178416
• Naturally embedded ternary trees having no internal node of label greater than 1.at n=8A233389
• a(n) = n^3 + 2*n^2 + 5*n + 11.at n=29A271779
• Primes of the form n^3 + 2n^2 + 5n + 11.at n=19A271840
• Primes of the form (1 + x)^y + (-x)^y where y is a divisor of x.at n=37A285887
• Yarborough primes that remain Yarborough primes when each of their digits are replaced by their squares.at n=38A296187
• Write n-th prime in binary, then increase each run of 0's by one 0, and increase each run of 1's by one 1. a(n) is the decimal equivalent of the result.at n=39A319406
• Primes that are the sum of two cubes.at n=41A334520
• Numbers in a hexagonal tiling (seen as concentric rings) which have exactly three neighbors whose difference from it is prime.at n=29A372223
• Smallest prime p such that the multiplicative order of 4 modulo p is 2*n, or 0 if no such prime exists.at n=46A372797
• Smallest prime p such that the multiplicative order of 16 modulo p is 2*n, or 0 if no such prime exists.at n=46A372800