39397

Properties

Appears in sequences

• Primes that are palindromic in base 14.at n=31A029981
• Substrings from the right are prime numbers (using only odd digits different from 5).at n=33A032437
• a(n) = n^4 + 5*n^2 + 1.at n=14A082113
• Number of positive integers <= 10^n that are divisible by no prime exceeding 5.at n=28A106598
• Primes p such that p's set of distinct digits is {3,7,9}.at n=30A108385
• Number of arrangements of 4 numbers x(i) in -n..n with the sum of x(i)*x(i+1) equal to zero.at n=29A188359
• Primes formed by concatenating k, k, and 7.at n=12A210513
• Primes 10k + 7 preceding the maximal gaps in A269238.at n=8A269239
• a(n) is the least prime p such that the next prime after p with the same last digit as p is p+10*n.at n=20A328550
• Expansion of Product_{k>=1} 1 / (1 - 4^(k-1)*x^k).at n=8A338673
• First of three consecutive primes p,q,r such that r^2-p^2+p, r^2-p^2+q and r^2-p^2+r are consecutive primes.at n=39A347531
• Exponents k such that exp(k)/Pi is closer to an integer than for any smaller k.at n=11A387495
• Prime numbersat n=4148