Interlinking

[RJPennyPacker]

I have a site with several pages based around different keywords. In the past I have been putting 20 links for widgets on every page. So say I have 100 keywords, and 100 pages 1 for each keyword. I would put links to pages 2-21 on page #1, 22-42 on page 2, 42-62 on page 3, 62-82 on page 4, 82-100, then 1-2 on page 5. Then I would repeat on page 6 2-22, page 7 then 22-42 on 8 and so on until all 100 pages had 20 links. Now Looking back do I need to even have any links on pages 6-100? I mean as long as the spider comes in through page 1 it should index my pages. Would pages 6-100 be considered interlinking? Would it effect my rankings either way? Thank you.

[Stefan]

I mean as long as the spider comes in through page 1 it should index my pages.

Yep, as long as they're all linked to from somewhere on the site. Internal navigation can shift your available PR to specific sections/pages that you want to do well, downstream of the index, so that's a consideration. If you get incoming links to pages other than index, then that affects things too.

Would pages 6-100 be considered interlinking? Would it effect my rankings either way?

If by interlinking you mean your internal navigation, I don't think any SE minds how you rig your internal links... the things that cause problems are usually recip links to dodgy neighbourhoods, doorway pages, etc. I have to admit to not really following the link method you described...