52901

Properties

Appears in sequences

• Base-9 palindromes that start with 8.at n=25A043035
• Primes p such that (p-1) and the period length of 1/p are both squares.at n=21A076516
• Primes p such that all prime factors of p-1 have exponent 2.at n=16A089195
• Primes p such that primorial(p)/2 + 2 is prime.at n=25A096177
• Primes of the form 4*k^2 + 1.at n=37A121326
• Lower twin primes p1 such that p1-1 is a square.at n=10A145824
• Primes of the form 81*k^2 - 72*k + 17.at n=3A154276
• a(n) = 81*n^2 - 72*n + 17.at n=26A154277
• Primes of the form p^2 + 2*p + 2 where p is prime.at n=13A157467
• Primes which are within 1 of a square number.at n=39A163588
• Number of binary strings of length n with no substrings equal to 0001 0010 or 1101.at n=24A164452
• Primes of the form 1+A162143(k).at n=4A164517
• Primes of the form (10p)^2 + 1, where p is also prime.at n=4A179293
• A239459(n) / n.at n=22A239462
• Primes p such that gcd(phi(p-1), sigma(p-1)) = 1 with phi = A000010, sigma = A000203.at n=25A270539
• Numbers k such that for any positive integers a < b, if a * b = k then b - a is a square.at n=43A276460
• Primes that can be represented in the form b^n+1 or b^n-1 where b >= 2 and n >= 2.at n=42A296422
• a(n) = Sum_{d|n} d*binomial(d+2,3).at n=22A321598
• a(n) = 1 + 100*n^2 for n >= 0.at n=23A323178
• Primes of the form (m^(p^2) - 1)/(m^p - 1) with prime p and integer m >= 2.at n=39A383925