1. The problem statement, all variables and given/known data What is the next number in the following series? 1 2 12 48 216 936 4104 17928 78408 342792 ____________ 2. Relevant equations I haven't any idea 3. The attempt at a solution power's of two, powers of three, prime numbers. I am beat it can be found on this test --->http://www.mental-testing.com/ Mod's, I am sorry if this is in the wrong sub-directory. I couldn't figure out where else to put it.