113107domain: NAppears in sequencesSemiprimes p such that next semiprime after p is p+30.at n=3A217357Number of hypoplactic classes of 3-parking functions of length n.at n=6A243675Expansion of (1/x) * Series_Reversion( x / ( (1+x) * (1+2*x)^3 ) ).at n=5A371398