360672domain: NAppears in sequencesCoordination sequence for 4-dimensional RR-centered di-isohexagonal orthogonal lattice.at n=32A008528Numbers k such that core(k) = b(k,1)*b(k,0) where b(k,1) is the number of 1's in binary representation of k, b(k,0) the number of 0's and core(k) the squarefree part of k.at n=20A071639