$m$ $\delta = 2$ $\delta = 3$ $\delta = 4$ $\delta = 5$ $\delta = 6$ $\delta = 7$ 20 16 0 0 0 0 0 21 0 0 0 0 0 0 22 898 520 0 0 0 0 23 0 160 0 0 0 0 24 26212 53776 10560 0 0 0 25 400 26666 - - - - 26 532332 3166742 - - - - 27 28992 2336224 - - - - 28 8505776 141492234 - - - - 29 1040480 144902754 - - - - 30 114631028 5365597606 - - - -