1190910domain: NAppears in sequencesa(n) = (4*n+1)*(4*n+2)*(4*n+3).at n=26A001505Squarefree numbers which are products of three consecutive numbers. I.e., squarefree numbers of the form k^3 - k.at n=15A084694Product of the n-th run of squarefree numbers.at n=29A136742a(n) = 3*n*(3*n + 1)*(3*n + 2).at n=34A228889