n this scheme, the pagination for page 1 looks like this:

1 2 3 … 101 … 200
And for deeper pages, it looks like this:

1 … 12 … 23 24 25 26 27 … 113 … 200
 

Note that this is exactly the same as the “Step by Two, plus ‘Last’ Link” scheme above, except with two additional links inserted.

The “101” in the above example was added because it is the midpoint between 3 and 200, and the “113” because it is the midpoint between 27 and 200. In other words, the new link is based on the number you get by averaging the numbers immediately to the left and right of the “…” in the old scheme. These midpoint links make it possible to for a crawler to get from any page to any other page in just a few steps.