$m$ $\delta = 2$ $\delta = 3$ $\delta = 4$ $\delta = 5$ $\delta = 6$ $\delta = 7$ 18 14 0 0 0 0 0 19 0 0 0 0 0 0 20 688 406 0 0 0 0 21 0 140 0 0 0 0 22 17642 37522 7518 0 0 0 23 350 20650 6636 0 0 0 24 316948 1992534 1142688 115416 0 0 25 22300 1622132 - - - - 26 4522264 81119956 - - - - 27 705634 91144990 - - - - 28 54997600 2831949190 - - - - 29 15109676 4131333512 - - - - 30 596459876 89621999512 - - - -