93046domain: NAppears in sequencesThe number of 1's in the n-th stage of A164349.at n=18A164363Number of nXnXn 0..6 triangular arrays with each element x equal to the number its neighbors equal to 4,3,2,1,1,0,0 for x=0,1,2,3,4,5,6.at n=5A203123