90031

Properties

Appears in sequences

• Primes that remain prime through 4 iterations of function f(x) = 9x + 2.at n=31A023324
• Primes that remain prime through 5 iterations of function f(x) = 9x + 2.at n=7A023352
• a(n) = F(n) * Sum_{k|n} 1/F(k), where F(k) is the k-th Fibonacci number.at n=24A111075
• a(n) = Fibonacci(n) * Sum_{d|n} -(-1)^(n/d) / Fibonacci(d).at n=24A203802
• Primes p whose binary representation p_2 is the decimal representation of a prime q; and also the sum of the decimal digits of p equals the sum of the digits of p_2.at n=6A281299
• Prime numbersat n=8720