1024000000domain: NAppears in sequencesSmallest square containing exactly n decimal digits '0'.at n=6A036507Discriminant of minimal polynomial of 2*cos(Pi/n) (see A187360).at n=19A193681Number of (3+1)X(n+1) arrays of permutations of 0..n*4+3 with each element having index change +-(.,.) 0,0 0,2 or 1,0.at n=6A264209