$m$ $\delta = 2$ $\delta = 3$ $\delta = 4$ $\delta = 5$ $\delta = 6$ $\delta = 7$ 21 35 0 0 0 0 0 22 0 0 0 0 0 0 23 1212 735 0 0 0 0 24 0 102 0 0 0 0 25 28120 60343 - - - - 26 153 15001 - - - - 27 498951 3097951 - - - - 28 10742 1215937 - - - - 29 7308223 126244254 - - - - 30 378301 71531604 - - - -