85453

Properties

Appears in sequences

• a(n) = T(n,n+3), T given by A027023.at n=14A027025
• a(n) = a(1) + a(2) + ... + a(n-1) - a(m) for n >= 4, where m = 2*n - 3 - 2^(p+1) and p is the unique integer such that 2^p < n - 1 <= 2^(p+1), starting with a(1) = a(2) = 1 and a(3) = 4.at n=18A049896
• Primes that are the average of the members of more than one emirp pair.at n=10A178587
• Primes that are the average of the members of exactly 2 emirp pairs.at n=6A178588
• Number of length n+2 0..1 arrays with at most two downsteps in every n consecutive neighbor pairs.at n=23A256817
• Prime numbersat n=8319