Assume the following notebook of Rubi rules
nb = Import["https://github.com/RuleBasedIntegration/Rubi/raw/master/IntegrationRuleNotebooks/1%20Algebraic%20functions/1.1%20Binomial%20products/1.1.1%20Linear/126.96.36.199%20(a%2Bb%20x)%5Em.nb", "NotebookObject"];
If you open all cell-groups, you find that at the deepest level, there are
"Code" cells. What is a pragmatic way to open this notebook in read-only mode and navigate to the n-th (say 18th) code cell automatically, so that the user directly sees the
Functions that are helpful are
Cells, and friends, but I feel my hacks are not entirely beautiful and this may be a question of general interest. So I would be delighted if you give me your best shot.