27031

Properties

Appears in sequences

• Primes that divide at least one term of Sylvester's sequence s = A000058: s(n+1) = s(n)^2 - s(n) + 1, s(0) = 2.at n=40A007996
• Primes that remain prime through 3 iterations of function f(x) = 3x + 8.at n=20A023279
• Numbers p from A001125 such that 2*p-3 is prime.at n=36A063939
• Smallest k>n such that n^3+1 divides k*n^2+1.at n=30A071568
• Numerators of convergents to Thue-Morse constant.at n=12A085394
• First differences of A019300.at n=15A088172
• Primes arising as A093929(n)*A093929(n+1)+2.at n=39A093930
• Primes of the form n^3 + n + 1.at n=13A095692
• Primes p such that the number of primes less than p equal to 1 mod 4 is two less than the number of primes less than p equal to 3 mod 4.at n=40A096451
• Intersection of A061068 and A064270.at n=38A128996
• Quadruple lucky numbers (lower terms). Numbers n such that n, n+2, n+6, n+8 are all Lucky numbers.at n=22A139783
• Primes p such that the multiplicative order of 2 modulo p is (p-1)/10.at n=37A152310
• Primes which are triangular numbers plus 3.at n=23A159047
• Numerators of fractions with denominators A000215(n) approximating the Thue-Morse constant.at n=4A162634
• Primes of the form ((p-1)/2)^3+((p+1)/2), p are prime numbers.at n=11A163421
• Primes of the form p + (p-1)^3, where p is also prime.at n=5A165946
• Primes of the form 10n^2 - 9.at n=18A201964
• Primes p such that p+2, p+4, p+6, p+8, p+10 are semiprimes.at n=7A241959
• Number of length 7+3 0..n arrays with every four consecutive terms having the sum of some three elements equal to three times the fourth.at n=9A248544
• Partial sums of A246031.at n=20A255364