28140001domain: NAppears in sequencesa(n) = 80000*n^2 - 39200*n + 4801.at n=18A157653Numbers m such that each of the four consecutive integers m, m+1, m+2, m+3 has squarefree rank 1.at n=32A290340Starts of runs of 4 consecutive integers in A268375.at n=13A368404