334969

Appears in sequences

• Numbers k such that 1000000000k+1, 1000000000k+3, 1000000000k+7, 1000000000k+9 are all primes.at n=12A064968
• The numbers of a square spiral with 1 in the center, lying at integer points of the right branch of the parabola y=n^2.at n=17A357281