129961

Appears in sequences

• Strong pseudoprimes to base 19.at n=36A020245
• a(n) = n^4 - n^2 + 1.at n=19A060886
• a(n) = sigma_4(n^2)/sigma_2(n^2).at n=18A084218
• Composite numbers k such that b^k == b (mod sigma(k)) for every integer b.at n=5A277286