____twoism

Don't know if this means anything or if I've added up wrong, but…

Put the numbers in a 6x6 grid.
Add up the numbers in each column (e.g. 6 + 6 + 7 + 9 + missing + 5), then add up the totals of the results for each column. You get 148.
Add up the numbers in each row (e.g. 6 + 9 + 9 + 7 + 4 + 2 ...