67961

Properties

Appears in sequences

• Numbers k such that the continued fraction for sqrt(k) has odd period and if the last term of the periodic part is deleted the two central terms are both 27.at n=12A031615
• Largest prime substring in 6^n (0 if none).at n=8A046272
• Numbers n such that (x^n-1/x^n)/(x-1/x) is prime, where x = sqrt(3) + sqrt(2).at n=18A158878
• Primes of the form x^2+2^x+y^2+2^y, with x and y nonnegative.at n=18A162576
• Prime numbersat n=6770