629857

Properties

Appears in sequences

• Class 1- (or Pierpont) primes: primes of the form 2^t*3^u + 1.at n=37A005109
• Primes of form 1+(2^a)*(3^b), a>0, b>0.at n=31A058383
• Numbers n such that sigma(n) = 2n - 3*phi(phi(n)).at n=32A110074
• Primes of the form 4n^3 + 1.at n=13A199307
• Generalized cuban primes (A007645) which are also Class 1- (or Pierpont) primes (A005109).at n=32A217035
• Number of (n+2) X (1+2) 0..1 arrays with each 3 X 3 subblock having clockwise perimeter pattern 00010001 00010101 or 01010101.at n=19A261106
• a(n) is the least prime of the form 2^j*3^k + 1, j > 0, k > 0, j + k = n. a(n) = 0 if no such prime exists.at n=12A336773
• Primes p such that there exists a cyclic permutation of the nonzero residues modulo p such that v^2 - 4*u*w == 0 (mod p) for any three consecutive residues u,v,w.at n=20A376008
• Prime numbersat n=51327