1372559domain: NPropertiesPrimalityPrimeyesAppears in sequencesInitial member of 9 consecutive primes {a, b, c, d, e, f, g, h, i} such that (a + b + c)/3, (d + e + f)/3 and (g + h + i)/3 are all prime.at n=9A294147Prime numbersat n=105146