101653

Properties

Appears in sequences

• Positive numbers k such that k and 6*k are anagrams in base 9 (written in base 9).at n=7A023083
• 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=16A031615
• For p = prime(n), a(n) is the smallest prime q such that pq is a base-2 pseudoprime; that is, 2^(pq-1) = 1 mod pq; a(n) is 0 if no such prime exists.at n=38A085012
• Primes n that are concatenation of two 3-digit primes p<q.at n=16A168529
• Primes that are the concatenation of two 3-digit primes.at n=16A255976
• Prime numbersat n=9735