163064domain: NAppears in sequencesNumber of 5-tuples (v1,v2,v3,v4,v5) of nonnegative integers less than n such that v1 <= v5, v2 <= v5, v2 <= v4 and v3 <= v4.at n=15A085461Number of simple labeled graphs on n+2 nodes with exactly n connected components that are trees or cycles.at n=32A215862