无理数如 π，其小数位是否存在形如「123456789」连续的数字组合？

我觉得只能算出来硬找吧，对 Pi 来说这网站已经存在了：
angio.net/pi/bigpi.cgi

123456789：
Results
The string 123456789 did not occur in the first 200000000 digits of pi after position 0.
(Sorry! Don't give up, Pi contains lots of other cool strings.)

但是12345678：
Results
The string 12345678 occurs at position 186,557,266 counting from the first digit after the decimal point. The 3. is not counted.

12346567：
Results
The string 1234567 occurs at position 9,470,344 counting from the first digit after the decimal point. The 3. is not counted.

123456：
Results
The string 123456 occurs at position 2,458,885 counting from the first digit after the decimal point. The 3. is not counted.

可以读一下 angio.net/pi/whynotpi.h
原发布于 https://www.zhihu.com/question/19723480/answer/12764303