43829

Appears in sequences

• a(1)=3; for n > 1, a(n) = 1 + a(n-1) + gcd( a(n-1)*(a(n-1)+2), A073829(a(n-1)) ).at n=41A167053
• Numbers that can be written in more than 1 way as p^2 + 3pq + q^2 with primes p < q.at n=18A218795
• Semiprimes p*q such that p*q+p+q, p*q-(p+q), p*q+2*(p+q) and p*q-2*(p+q) are all primes.at n=31A356765
• The five digits of a(n) and their four successive absolute first differences are all distinct.at n=22A365257