20443

Properties

Appears in sequences

• Primes of the form n^2 - 6.at n=22A028880
• a(n) = prime(q(n)), where q(n) = A002110(n).at n=5A062447
• Primes whose decimal representation is a valid number in base 5 and interpreted as such is again a prime.at n=31A090708
• prime(k) for those k where floor((2*(prime(k+1)-prime(k))*PrimePi(k) mod (8*k))/k) = m with m = 10.at n=23A109564
• Primes p such that q-p = 34, where q is the next prime after p.at n=7A134116
• Primes congruent to 8 mod 61.at n=39A142806
• Number of n X n binary arrays symmetric under 90 degree rotation with all ones connected only in a 2X4 el 1,1 1,2 1,3 1,4 2,4 with any orientation.at n=12A146021
• Primes p of the form : p+p^2+p^3-+8=prime.at n=18A154823
• Primes whose base-3 representation also is the base-2 representation of a prime.at n=31A235265
• Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 542", based on the 5-celled von Neumann neighborhood.at n=38A272811
• MM-numbers of labeled simple hypergraphs with no singletons spanning an initial interval of positive integers.at n=25A320463
• MM-numbers of labeled multi-hypergraphs with no singletons spanning an initial interval of positive integers.at n=32A320464
• Squarefree MM-numbers of strict uniform regular multiset systems spanning an initial interval of positive integers.at n=35A322703
• Primes having Fibonacci prime gaps to both neighbor primes.at n=6A353135
• Primes p such that neither g-1 nor g+1 is prime, where g is the gap from p to the next prime.at n=18A355485
• Primes having only {0, 2, 3, 4} as digits.at n=25A386041
• Prime numbersat n=2310