106217

Properties

Appears in sequences

• Primes p with an even number of digits such that each digit in the second half of p is larger by 1 than the corresponding digit in the first half.at n=14A241212
• Consider the group freely generated by an element U of order 3 and an element S of order 2. a(n) gives the number of words in the alphabet {U,S} of length n that are equal to unity.at n=22A265434
• Primes p such that p+2, (p^2-1)/2+p and (p^2+3)/2+3*p are also prime.at n=31A352948
• Prime numbersat n=10123