$m$ $\delta = 2$ $\delta = 3$ $\delta = 4$ $\delta = 5$ $\delta = 6$ $\delta = 7$ 16 25 0 0 0 0 0 17 0 0 0 0 0 0 18 617 400 0 0 0 0 19 0 72 0 0 0 0 20 10330 24738 5375 0 0 0 21 108 7716 2664 0 0 0 22 135396 982316 617581 67450 0 0 23 5432 473262 447132 60528 0 0 24 1506996 31831449 44441691 12664449 836580 0 25 138476 21682704 - - - - 26 14972286 920256950 - - - - 27 2443958 826095332 - - - - 28 137163726 24771314463 - - - - 29 34172064 27745500038 - - - - 30 1184699784 635464161474 - - - -