54853domain: NAppears in sequencesExpansion of 1/((1-2*x)*(1-6*x)*(1-7*x)*(1-9*x)).at n=4A026326Number of rooted trees of 2n+1 nodes with every leaf at height n.at n=21A074045Numbers whose distance to the nearest cube equals the distance to the nearest product of 3 consecutive integers (three-dimensional oblong).at n=37A342873