44801

Appears in sequences

• Strong pseudoprimes to base 5.at n=13A020231
• Strong pseudoprimes to base 25.at n=29A020251
• Strong pseudoprimes to base 36.at n=36A020262
• Strong pseudoprimes to base 52.at n=19A020278
• Strong pseudoprimes to base 83.at n=19A020309
• a(n) = (2*n-1)*(n^2 -n +2)/2.at n=35A063488
• a(n) = 28*n^2 + 1.at n=40A158556
• Numbers for which the root mean square of nontrivial divisors is an integer and which are not a square of prime numbers.at n=43A247137
• Euler pseudoprimes to base 5: composite integers such that abs(5^((n - 1)/2)) == 1 mod n.at n=27A262052
• Euler pseudoprimes to base 6: composite integers such that abs(6^((n - 1)/2)) == 1 mod n.at n=38A262053
• Base-5 Euler-Jacobi pseudoprimes: odd composite k coprime to 5 such that 5^((k-1)/2) == (5/k) (mod n), where (5/k) is the Jacobi symbol (or Kronecker symbol).at n=21A375914
• Composite numbers k == 1, 9 (mod 10) such that 5^((k-1)/2) == 1 (mod k).at n=20A375915