3386105856domain: NAppears in sequences(n-1)-st elementary symmetric function of the first n terms of (3,1,2,3,1,2,3,1,2,...).at n=30A203161Number of defective 3-colorings of an n X 3 0..2 array connected diagonally and antidiagonally with exactly one mistake, and colors introduced in row-major 0..2 order.at n=10A229505