98874domain: NAppears in sequencesNumber of "bifix-free" words of length n over a three-letter alphabet.at n=11A019308Number of site swap patterns with 3 balls and exact period n.at n=9A065179Number of non-self-conjugate separable solutions of X + Y = 2Z (integer, disjoint triples from {1,2,3,...,3n}).at n=9A282618