2-----------2x1=22x2=42x3=62x4=82x5=102x6=122x7=142x8=162x9=18 | | 3-----------3x1=33x2=63x3=93x4=123x5=153x6=183x7=213x8=243x9=27 | | 4-----------4x1=44x2=84x3=124x4=164x5=204x6=244x7=284x8=324x9=36 | | 5-----------5x1=55x2=105x3=155x4=205x5=255x6=305x7=355x8=405x9=45 | |
6------------6x1=66x2=126x3=186x4=246x5=306x6=366x7=426x8=486x9=54 | | 7------------7x1=77x2=147x3=217x4=287x5=357x6=427x7=497x8=567x9=63 | | 8------------8x1=88x2=168x3=248x4=328x5=408x6=488x7=568x8=648x9=72 | | 9------------9x1=99x2=189x3=279x4=369x5=459x6=549x7=639x8=729x9=81 | |