327760domain: NAppears in sequencesThe number of partitions of the set [n] where each element can be colored 1 or 2 avoiding the patterns 1^11^2 and 1^22^1 in the pattern sense.at n=9A209797Number of length n+3 0..2 arrays with no disjoint pairs in any consecutive four terms having the same sum.at n=13A247720