41809

Properties

Appears in sequences

• Primes with 21 as smallest positive primitive root.at n=6A061333
• Primes for which the smallest positive primitive root is odd and nonprime.at n=21A070269
• Number of n X n binary arrays symmetric under horizontal and vertical reflection with all ones connected only in a 0110-1111-0110 pattern in any orientation.at n=17A146919
• Prime numbers followed by two consecutive numbers which are products of four distinct primes (or tetraprimes).at n=13A362578
• a(n) = 10*Fibonacci(n) + (-1)^n.at n=19A372242
• Prime numbersat n=4371