231959domain: NAppears in sequencesExpansion of 1/((1-4x)(1-9x)(1-10x)(1-12x)).at n=4A028162The number of partitions of the set [n] where each element can be colored 1 or 2 avoiding the patterns 1^11^2, 1^12^2, and 1^22^1 in the pattern sense.at n=9A209798Sum of the positions of maximum parts in all compositions of n.at n=16A377823