N= 2(ort1)           1 positions*            3 cases stones on board 4 
N= 4(ort1)           5 positions**          15 cases stones on board 6
N= 6(ort1)          21 positions            43 cases stones on board 6
N= 8(ort1)          70 positions*          143 cases stones on board 8
N=10(ort1)         456 positions*          848 cases stones on board 9
N=12(ort1)        2166 positions          3967 cases stones on board 11
N=14(ort1)       15703 positions         27776 cases stones on board 13
N=16(ort1)      123923 positions        221073 cases stones on board 15   4s
N=18(ort1)      986196 positions       1746828 cases stones on board 17 0m34.3s
N=20(ort1)     8135731 positions      14422006 cases stones on board 19 5m22.2s
N=22(ort1)    79780790 positions     142154602 cases stones on board 21
N=24(ort1)   735832708 positions    1556659135 cases
N=26(ort1)  8407178062 positions*  14972671032 cases