4353861domain: NAppears in sequencesExpansion of 1/(1-x-x^4-x^6).at n=42A120446p-INVERT of (1,1,0,0,0,0,...), where p(S) = 1 - S - S^3.at n=20A291397Number of compositions (ordered partitions) of n into nonprime parts not greater than sqrt(n).at n=42A368873