1735841

Appears in sequences

• Sarrus numbers that become prime when two is added.at n=27A137198
• Composite numbers k such that k divides Fibonacci(k+1) or Fibonacci(k-1) and 2^(k-1) == 1 (mod k).at n=21A214434
• Fermat pseudoprimes to base 2 of the form (n^2 + 2*n)/3.at n=32A216170
• Pseudoprimes to a twin prime criterion of Aebi and Cairns.at n=28A224695
• Fermat pseudoprimes to base 2 that are octagonal.at n=32A321868
• Numbers that are both Fermat pseudoprimes to base 2 (A001567) and Bruckman-Lucas pseudoprimes (A005845).at n=13A329240