14923301575domain: NAppears in sequencesa(n) = ((6*n+7)(!^6))/7, related to A008542 ((6*n+1)(!^6) sextic, or 6-factorials).at n=7A053100Least common multiple of {1, 7, 13, 19, 25, ..., (6n+1)} (A016921).at n=8A131940