Yeah it looks like maybe there is a mistake or another series here that would make sense if position 1,3 was a 19 instead of 9.
General pattern is:
Top + down = down
left + right = right
30 , 18 , 48 , 66
Yeah it looks like maybe there is a mistake or another series here that would make sense if position 1,3 was a 19 instead of 9.
General pattern is:
Top + down = down
left + right = right
30 , 18 , 48 , 66