Question

Can anyone explain me this table. http://postimg.org/image/v57ixyddr/

It tell about periodicity of occurrence of products of two numbers that can be represented by general formula 6k +1 or 6k-1

I don't understand the meaning of last column. What do numbers 30, 42, 66, 78, 102 and 114 represent in last column ?

Answer 1

Answer is here http://math.stackexchange.com/questions/367106/how-the-periodicity-in-last-column-of-table-attached-is-being-calculated