195581domain: NPropertiesPrimalityPrimeyesAppears in sequencesNumbers that are the sum of 12 positive 11th powers.at n=22A004823Pentanacci analog of A055502.at n=18A113884Primes of the form (p^2 - 1)/16 - p, where p is also a prime.at n=21A165616Primes of the form kk*k+k+1, where kk is the concatenation of k with itself.at n=22A222962Prime numbersat n=17623