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A153161号
悬垂在1/3和2/3之间的Stern-Brocot树的分子;分母=A153162号.
2
1, 2, 3, 3, 3, 4, 5, 4, 5, 5, 4, 5, 7, 8, 7, 5, 7, 8, 7, 7, 8, 7, 5, 6, 9, 11, 10, 11, 13, 12, 9, 6, 9, 11, 10, 11, 13, 12, 9, 9, 12, 13, 11, 10, 11, 9, 6, 7, 11, 14, 13, 15, 18, 17, 13, 14, 19, 21, 18, 17, 19, 16, 11, 7, 11, 14, 13, 15, 18, 17, 13, 14, 19, 21, 18, 17, 19, 16, 11, 11, 16, 19
抵消
1,2
评论
对于所有1/3<u/v<2/3的互质对(u,v)存在唯一的k,使得a(k)=u和A153162号(k) =v;
a(1)=1,并且对于n>1:a(n)=如果A025480号(n-1)<>0和A025480号(n) <>0然后a(A025480号(n-1)+a(A025480号(n) )否则,如果A025480号(n) =0,然后a(A025480号(n-1)+2其他1+a(A025480号(n-1))。
例子
{1/3} . . . . . . . . . . . . . . . . . . . . . . . {2/3}
.......................... 1/2 ..........................
............... 2/5 ................. 3/5 ...............
...... 3/8 .......... 3/7 ..... 4/7 .......... 5/8 ......
.. 4/11 .. 5/13 . 5/12 . 4/9 5/9 . 7/12 . 8/13 .. 7/11 .
关键词
压裂,非n,标签
作者
状态
经核准的