452051

Appears in sequences

• Pseudoprimes to base 2 of the form 4k+3.at n=23A177884
• Composite numbers m such that (4^m - 2^m + 8*m^2 - 2) / (2*m*(2*m + 1)) is an integer.at n=15A235540
• Numbers k > 1 such that 2^k == 2 (mod k) and gcd(k, 3^k - 3) = 1.at n=11A300762
• Numbers k such that 2^(k-1) == 1 (mod k) and lpf(k)-1 does not divide k-1.at n=19A316906
• Numbers k such that 2^(k-1) == 1 (mod k) and p-1 does not divide k-1 for every prime p dividing k.at n=16A316907
• Lucasian pseudoprimes: composite numbers k such that 2^(k-1) == k+1 (mod k(2k+1)).at n=1A343679