Hello everyone!

I've got a bit of a dilemma. I have got a very large group of numbers (10206 numbers), I wanted to know if these numbers have a nth term between them.
Is there any program out there, or is there any pen and paper method of working out the nth, or sequence rule of these groups of numbers. The numbers are not of a regular sequence, there seems to be no pattern, but is there any way of working it out?

Thanks for any help,
Kind Regards,