23929

Properties

Appears in sequences

• Numbers k such that the period of the continued fraction for sqrt(k) contains exactly 100 ones.at n=16A031868
• Triangle in A059032 read by rows from left to right.at n=31A059033
• Triangle in A059032 read by rows in natural order.at n=31A059034
• a(1) = 2, a(n+1) = smallest prime of the form a(n) + k*prime(n+1), k >1.at n=37A085041
• a(1)=2; for n>1 a(n) is the largest prime number m such that a(n-1)^(1/(n-1))>m^(1/n).at n=23A086566
• a(1) = 3; for n > 1 a(n) is the least prime of form a(n-1) + k*prime(n-1) with k > 0.at n=38A095184
• Primes that are a concatenation of 2, 3 and a prime.at n=31A101218
• a(n) = 1 + 2 * least i such that A103507(i)=n+1, 0 if no such i exists.at n=34A103508
• Primes p such that q-p = 28, where q is the next prime after p.at n=20A124595
• Numbers k such that (3^k + 4^k)/7 is prime.at n=13A128066
• Home primes whose homeliness is greater than 4.at n=18A133963
• Home primes whose homeliness is greater than 5.at n=5A133965
• Home primes whose homeliness is 6.at n=1A133966
• Primes of the form 2*n^2 + 22*n + 9.at n=14A154601
• Number of 1X6 integer matrices with each row summing to zero, row elements in nondecreasing order, rows in lexicographically nondecreasing order, and the sum of squares of the elements <= 2*n^2 (number of collections of 1 zero-sum 6-vectors with total modulus squared not more than 2*n^2, ignoring vector and component permutations).at n=15A192693
• Primes which are the concatenation of two primes in exactly three ways.at n=6A238499
• Primes having only {2, 3, 9} as digits.at n=35A260128
• Primes p that remain prime through 3 iterations of function f(x) = 6x - 1.at n=24A289109
• a(n) = number of triangles with integer sides i <= j <= k with radius of circumcircle <= n.at n=34A331229
• Primes p such that p-2 is the product of two emirps.at n=35A345198