I have a set of sequence numbers beginning from 11 to 26.

n and m are variables.

n min = 11

n max = 19

or n = 11, 12…19

Pattern;

n will always going to add 7 elements to it

m will always have 8 elements

Example :

If n = 11 then m = 19,20……26

If n = 12 then m = 11, 20,21…26

If n = 13 then m = 11,12,21,22…26

If n = 14 then m = 11,12,13,22,23..26

If n = 15 then m= 11,12..14,23,24..26

How do you write this into a formula..?