1;
三;
3,9;
3,7,9,17;
3,9,7,21,9,17,17,33;
3,9,9,27,7,17,21,43,9,27,17,51,17,35,33,67;
3,9,9,27,9,21,27,51,7,21,17,51,21,41,43,83,9,27,27,81,17,43,51,113,17,51,35,105,33,67,67,137;
3,9,9,27,9,21,27,51,9,27,21,63,27,51,51,99,7,21,...
3,9,9,27,9,21,27,51,9,27,21,63,27,51,51,99,9,27,27,...
3,9,9,27,9,21,27,51,9,27,21,63,27,51,51,99,9,27,27,81,...
3,9,9,27,9,21,27,51,9,27,21,63,27,51,51,99,9,27,27,81,21,...
...
显然,在每一行中,术语的第一个四分之一(不再是)等于序列本身开头的3倍(在斯隆的评论之后更正了评论246万元2015年3月3日)。
(结束)