  Divide-and-conquer functions satisfy equations in F(z),F(z^2),F(z^4)... Their
generated sequences are mainly used in computer science, and they were analyzed
pragmatically, that is, now and then a sequence was picked out for scrutiny. By
giving several classes of ordinary generating functions together with
recurrences, we hope to help with the analysis of many such sequences, and try
to classify a part of the divide-and-conquer sequence zoo.
