37501

Properties

Appears in sequences

• Trajectory of 3 under map n->7n+1 if n odd, n->n/2 if n even.at n=36A037101
• Prime number spiral (clockwise, Northwest spoke).at n=31A053999
• Smallest prime of the form k*n^n + 1.at n=4A070855
• Primes of the form 2^a * 3^b * 5^c + 1 for positive a, b, c.at n=38A114991
• Integers k such that the k-th triangular number t_k has all its base-12 digits contained in {1,5,7,11}.at n=14A118711
• a(n) = 60*n^2 + 1.at n=25A158673
• E.g.f. satisfies: A(x) = exp( x/(1 - x*A(x)) ).at n=6A161630
• Numbers k such that 10^k-2*k-1 is prime.at n=12A174177
• Primes dividing repunits R(10^n) for some n.at n=31A178070
• Primes of the form k * m^m + 1 with k < m^m.at n=36A180362
• Number of (w,x,y,z) with all terms in {1,...,n} and |w-x|=2|x-y|-|y-z|.at n=37A212577
• Primes p such that p^2 - p - 1, p^3 - p - 1 and p^4 - p - 1 are all prime.at n=5A236173
• Primes p such that p^4 - p +/- 1 are twin primes.at n=20A236952
• a(0)=7; a(n) = 7*a(n-1) + 1 if a(n-1) is odd, a(n) = a(n-1)/2 otherwise.at n=41A271623
• Diagonal of the rational function 1/(1-(wxyz + wy + wz + x + y + z)).at n=3A275045
• Prime factors (counting multiplicity) of 10^10^10^10^2 - 1.at n=33A278835
• Prime numbersat n=3969