601411domain: NPropertiesPrimalityPrimeyesAppears in sequencesArray: row n shows the coefficients of the characteristic polynomial of the n-th principal submatrix of the symmetric matrix A203003; by antidiagonals.at n=29A203004Number of n X 4 0..1 arrays avoiding 0 0 1 and 0 1 0 horizontally and 0 1 1 and 1 0 1 vertically.at n=9A207415Prime numbersat n=49208