Indexing is a complicated procedure with weightings depending on HTML constructs, the number of times rc is in the page and many other factors. While some webmasters try to fool the search engines to get a high ranking, the robots have become so sophisticated that stuffing a page with rc will not be indexed in all likelihood.
Some parse the META tag, or other special hidden tags looking for rc. We hope that as the Web evolves more facilities becomes available to efficiently associate meta data such as indexing information with a document that is truly about rc. This is being worked on. But you can rest assured the links on the side of this page will give you the exact information you need.