a(0)=1到a(3)=10排序度序列:
() (2) (1,1) (1,1,2)
(1,3) (1,1,4)
(2,2) (1,2,3)
(3,3) (1,3,4)
(2,2,2)
(2,2,4)
(2,3,3)
(2,4,4)
(3,3,4)
(4,4,4)
例如,循环粒度
{{1,1},{2,2},{3,3},{1,2}}
{{1,1},{2,2},{3,3},{1,3}}
{{1,1},{2,2},{3,3},{2,3}}
{{1,1},{2,2},{1,3},{2,3}}
{{1,1},{3,3},{1,2},{2,3}}
{{2,2},{3,3},{1,2},{1,3}}
都有度y=(3,3,2),所以y在a(3)下计算。