20873

Properties

Appears in sequences

• Prime(n)*...*a(n) is the least product of consecutive primes which is non-deficient.at n=32A007686
• Prime(n)*...*a(n) is the least product of consecutive primes which is abundant.at n=32A007708
• Numbers k such that the continued fraction for sqrt(k) has period 53.at n=28A020392
• Primes such that the sum of the factorials of the digits is a perfect square.at n=35A052279
• Primes p such that p-2 and p+2 are divisible by a cube.at n=3A089202
• Primes which are also prime if their base 64 representation is interpreted as a base 10 number.at n=42A090717
• Primes p such that the polynomial x^5-x^4-x^3-x^2-x-1 mod p has 5 distinct zeros.at n=15A106281
• a(n) = (n^6 - 126*n^5 + 6217*n^4 - 153066*n^3 + 1987786*n^2 - 13055316*n + 34747236)/36.at n=8A121888
• Primes p that divide Fibonacci[(p+1)/7].at n=27A125252
• Prime numbers p for which quintonacci quintic polynomial x^5-x^4-x^3-x^2-x-1 modulus p is completely factorizable.at n=16A135846
• Prime numbers p not of the form 10k+1 for which the quintonacci quintic polynomial x^5 - x^4 - x^3 - x^2 - x - 1 modulus p is factorizable into five binomials.at n=12A135847
• Primes congruent to 46 mod 59.at n=37A142773
• Primes p such that none of p-2, p-1, p+1, and p+2 is squarefree.at n=9A153215
• a(n) = 81*n^2 - 2247*n + 15383.at n=30A182255
• a(n) is the smallest prime such that it and the previous three primes are all of the form x^2 + n * y^2.at n=7A212604
• a(n) is the smallest prime such that it and the previous three primes are all of the form x^2 + n * y^2.at n=15A212604
• Primes p such that p^2 + 4 and p^2 + 10 are also primes.at n=41A237890
• Primes of the form abs(1/(36)(n^6 - 126n^5 + 6217n^4 - 153066n^3 + 1987786n^2 - 13055316n + 34747236)) in order of increasing nonnegative n.at n=8A272555
• a(n) = a(n-1) + a(a(n-1) mod n) + 1, a(0) = 1.at n=32A308576
• Primes p such that A001175(p) = 2*(p+1)/7.at n=23A308785