Originally Posted by Old Pedant
With only one parent at each level.
this is my point exactly - yes, we have the number of kids and yes, we have the number of "generations" but to make the picture complete we need (I think) the number of "primary ancestors", which is not being given (or it is, but that number is radically different between the first diagram - a busload - and the second - two).
So with that factor undefined the whole thing is meaningless, because whoever designs it will end up having to pick a number, just like you did - one in this case. But you could have easily picked 12 or 78, still fit the requisites and produced radically different outcomes.
I think. I was never much of a mathematician, anyway.