432821

Appears in sequences

• Strong pseudoprimes to base 15.at n=30A020241
• a(1)=1, a(n) is the smallest integer > a(n-1) such that the sum of elements of the simple continued fraction for S(n)=1/a(1)+1/a(2)+...+1/a(n) equals n^3.at n=18A071971
• Overpseudoprimes to base 3.at n=25A141350
• Overpseudoprimes to base 5.at n=23A141390
• Strong pseudoprimes to base 3 of the form 6*k-1.at n=1A215565
• Strong pseudoprimes to bases 3 and 5.at n=1A215566
• a(n) is the smallest k such that the p-rank of (Z/kZ)* is 2, where p = prime(n) and (Z/kZ)* is the multiplicative group of integers modulo n.at n=18A307434
• G.f. A(x) satisfies: 1 - x = Sum_{n>=0} x^n * (x^n + (-1)^n*A(x))^n.at n=14A352816
• Composite numbers k == 5, 7 (mod 12) such that 3^((k-1)/2) == -1 (mod k).at n=21A375918