PATTERNS SECTION
Sieve
If you were having trouble with every third number, here is a list of all of them in the sieve:
3(but don't cross this one off)
6
9
12
15
18
21
24
27
30
33
36
39
42
45
48
51
54
57
60
63
66
69
72
75
78
81
84
87
90
93
96
and finally 99