Wondering how these url's get into the index

Have a look at this to see what got me interested.

I don't know how these url's got indexed, but I want to take a guess.

Did someone 301 redirect one of their already indexed pages to one of those urls? That's my guess but it seems a little weird if that happened in all of those cases.

So... what happened? And what would happen in the case of the 301 I mentioned?

Edit: Before some cleaning-up, most of the url's were broken and returned 404's.

 

This is Google...Don't condemn god!

 

shouldn't those pages be in the supplemental index?

 

I think they are... it doesn't go far without &filter=0, I added that so everybody could see

 

Even big websites use redirect spam, check it out:

http://www.google.com/search?q=www1...homevalues.asp&hl=en&lr=&newwindow=1&filter=0

 

come on! thats google... you cant question them..

 

I'm much more concerned with the implications... it seems like there is something to be learned

 

well nothing wrong to phree_radical's ask question..

 

Simple answer is that people link to these urls. For example :
http://siteexplorer.search.yahoo.co...wm=i&bwms=p&bwmf=u&fr=yfp-t-501&fr2=seo-rd-se
People are linking to google.com/search/ it is the same for the other urls as well.