451905

Appears in sequences

• Pseudoquadprimes: p+4 for primes p where p+4 divides p^(p+4) + 4 and p+4 is composite.at n=29A100875
• Pseudoprimes (base-2) equal to product of 4 primes not necessarily distinct.at n=27A112441
• Fermat pseudoprimes to base 2 divisible by 5.at n=24A216023
• Fermat pseudoprimes to base 2 divisible by 15.at n=7A216364
• Pseudoprimes n to base 2 such that n-2 and n-4 are primes.at n=4A230488
• a(0) = a(1) = a(2) = 1; thereafter a(n) = a(n-1) - (-1)^n*a(n-2) + 2*a(n-3).at n=44A329301