1246784domain: NAppears in sequencesExpansion of 1/((1-x)^7 - x^7).at n=17A049017Number of walks of length n between two nodes at distance 3 in the cycle graph C_7.at n=20A095308p-INVERT of (1,1,1,1,1,...), where p(S) = 1 - S^7.at n=23A290994