47042domain: NAppears in sequencesNumber of binary strings of length n with no substrings equal to 000, 010, or 111.at n=49A164317Arises in the maximum number of C5's in a triangle-free graph.at n=43A185721Number of ternary length-2 squarefree words of length n not containing the subwords 021 or 10.at n=25A373554