168631domain: NPropertiesPrimalityPrimeyesAppears in sequencesPrimes of the form 2310*p + 1 where p is a prime.at n=6A051649Centered heptagonal twin prime numbers.at n=17A144975Number of (w,x,y,z) with all terms in {1,...,n} and 2|w-x|<n+|y-z|.at n=21A212687Prime numbersat n=15385