19853

Properties

Appears in sequences

• Numbers k such that the continued fraction for sqrt(k) has period 81.at n=18A020420
• Primes that remain prime through 3 iterations of function f(x) = 9x + 4.at n=36A023297
• Primes p = prime(k) such that prime(k) + prime(k+7) = prime(k+1) + prime(k+6) = prime(k+2) + prime(k+5) = prime(k+3) + prime(k+4).at n=9A064102
• Balanced primes of order four.at n=20A082079
• Indices of primes in sequence defined by A(0) = 39, A(n) = 10*A(n-1) - 1 for n > 0.at n=18A101847
• Primes congruent to 28 mod 61.at n=35A142826
• Primes p such that 4*p and 6*p are each the sum of two consecutive primes.at n=28A164133
• a(n) = 12*n^2 - 8*n + 9.at n=40A167585
• Central term of nine successive primes whose average is a prime.at n=36A180457
• Primes of the form 5n^2 + 8.at n=10A201486
• Primes of the form x^3 + 2*y^3, with nonnegative x and y.at n=32A219559
• a(n) = 139*n^2 - 2307*n + 3331.at n=22A230307
• Primes p such that p^2 + 4 and p^2 + 10 are also primes.at n=39A237890
• Non-palindromic balanced primes.at n=40A256076
• Number of parts in all partitions of n with largest multiplicity eight.at n=30A320378
• Primes p such that (p+nextprime(p))/6 is prime and 6*p is the sum of two consecutive primes.at n=17A339775
• a(n) = n*A340339(n)+b, where b = 1 if n is even or 2 if n is odd.at n=27A340340
• Prime numbersat n=2246