51199

Properties

Appears in sequences

• Primes with 12 as smallest positive primitive root.at n=17A061325
• Primes p such that positive values of p - A002110(k) are all primes for k > 0.at n=24A068374
• Primes of the form 2^r*5^s - 1.at n=18A077313
• Primes of the form 8*k^2 - 1.at n=33A090684
• Total number of nonprime parts in all partitions of n.at n=31A144119
• Number of 2-sided strip polytans with n cells.at n=12A151521
• a(n) = smallest prime p such that p-1 and p+1 together have n prime divisors, or a(n) = 0 if no such prime exists.at n=17A155800
• a(n) = 50*n^2 - 1.at n=31A157919
• a(n) = 32*n^2 - 1.at n=39A158563
• Primes p whose smallest positive primitive root (mod p) is not squarefree.at n=17A205581
• Primes of the form 2^(k-1)*k^2-(-1)^k.at n=8A216362
• Primes p for which p^i + 4 is prime for i = 1, 3 and 5.at n=7A243780
• Numbers n whose reversal is a multiple of the reversal of n+1.at n=16A250603
• Smallest of 4 consecutive prime numbers that when represented as a simple continued fraction, generates prime numbers in the numerator and denominator, when reduced.at n=36A270884
• Decimal representation of the x-axis, from the origin to the right edge, of the n-th stage of growth of the two-dimensional cellular automaton defined by "Rule 141", based on the 5-celled von Neumann neighborhood.at n=15A279148
• Decimal representation of the diagonal from the corner to the origin of the n-th stage of growth of the two-dimensional cellular automaton defined by "Rule 355", based on the 5-celled von Neumann neighborhood.at n=30A287780
• Primes p such that all the composite numbers between p and its next prime have no more than 2 distinct prime factors.at n=27A303436
• Primes having only {1, 5, 9} as digits.at n=39A385781
• Prime numbersat n=5239