Puzzler of 01/21/2012: What is X in the series 4, 6, 12, 18, 30, 42, 60, X, 102, ...?

"All the entries after yours were copied from Google searches and the copiers don’t know crap about what they are posting. They are just a bunch of math wannabes.

Disgusting. It’s the last time I submit an answer to a puzzler. I’ll let the pseudo math-gurus answer first."

Given your tone, perhaps that’s for the best.