929088domain: NAppears in sequencesNumber of nX1 0..2 arrays with exactly floor(nX1/2) elements unequal to at least one king-move neighbor, with new values introduced in row major 0..2 order.at n=20A222395a(n) is the number of distinct resistances that can be produced using at most n unit resistors in a planar network.at n=15A340921