Alan

I don't know where this number: ((32!^4)*20!)*66.466304816293425, comes from (and why bother with all those decimal places!) but even if a computer could manage 20! calculations a second the 32!^4 is so large it would take more than the lifetime of the Universe!

Just type this in pretty much as you've written it, except change (5root7) to (5*7^1/2) or (5*sqrt(7))

There are an infinite number of possibilities for this sequence as can be seen from the table below (though I guess the simplest one is the one suggested by Melody)!

Or it could be an oscillating sequence: 1/7 0 -1/7 0 1/7 0 -1/7 0 1/7 0 ...etc.

Or ...!!!

What is it that you want to be done with this?

Actually Melody, you are currently only 9 hours ahead of the UK as we have a 1 hour daylight saving time (or British Summer Time as it's known here) during the (northern hemisphere) summer months.

Multiply the 2.5 cm/year by 75*10⁶ years to get the result in cm.  Then divide the result by 10⁵ cm/km to get the result in km.

I can't see the images either.