Why? If my password is id8FK38f@&&#d is it inherently less secure if 111 appears in the middle of it somewhere?
> no prime numbers, no more than 2 even or odd numbers in a row (e.g., 644 not allowed), no sequence of 2 or more characters may repeat more than 2 times (e.g. aabaa not allowed), no ascending or descending sequences longer than 2 characters in a row (e.g. 123 or cba not allowed)
I think I've seen password restrictions similar in spirit to those, though.