131764domain: NAppears in sequencesNumber of permutations of length n with no consecutive triples i,...i+r,...i+2r for all positive and negative r, and for all equal spacings d.at n=9A174085Not appropriate for the OEIS.at n=1A248691Expansion of Product_{k>=1} 1/((1 - x^(k^2))*(1 - x^k)).at n=34A369520