125592domain: NAppears in sequencesPartial sums of number of different shapes formed by bending a piece of wire of length n in the plane A066372.at n=21A178937Starts of runs of 4 consecutive positive negabinary-Niven numbers (A331728).at n=34A331824Expansion of e.g.f. LambertW( -2*x/(1-x) ) / (-2*x).at n=5A352448