Relationship between handicap stones of Go and reverse komi

Handicap stone	Formula	First move reverse komi
2 stones	13×1	13
3 stones	13×2	26
4 stones	13×3	39
5 stones	13×4	52
6 stones	13×5	65
7 stones	13×6	78
8 stones	13×7	91
9 stones	13×8	104

It is a handicap table that a professional Go player showed (The average amateur 6D is 4 stones). If there are 6 stones and more, the value of one stone is increased, and the formula does not hold.