64387

Appears in sequences

• Gaps of 2 in sequence A038593 (upper terms).at n=28A038644
• Concatenation of n in base 2 up to base 10 and n in base 10 down to base 2 is prime, all numbers are interpreted as decimals.at n=13A054258
• Numbers n such that 6*10^n+7 is prime.at n=20A103026
• a(n) = n^2*(2*n + 5).at n=31A163683
• Smallest value of x such that x^2 + y^2 = P, where P is the product of the first n primes of the form 4k + 1, and 0 < x < y.at n=10A236381
• Composite numbers k such that k-1 divides 2^k-2.at n=38A330382