1664083domain: NPropertiesPrimalityPrimeyesAppears in sequencesPerimeter of integer triangle (A001611(n), A001611(n+1), A001611(n+2)).at n=28A097280Number of reduced rearrangement patterns with n blocks.at n=8A271214Primes of the form p(k)*p(k+1)*(p(k+1) - p(k)) - 1 sorted by increasing k.at n=21A383243Prime numbersat n=125621