138460domain: NAppears in sequencesDenominators of column 2 of table described in A051714/A051715.at n=42A051719Numbers n such that sigma(n) = 8*phi(n).at n=21A104901Partial sums of A005587. Fourth column of triangle A115127.at n=22A115129Number of 4-member subsets of [4*n] whose elements sum to a multiple of n.at n=24A318625