A018772 - OEIS

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A018772 as a simple table

n	a(n)
1	1
2	2
3	3
4	4
5	6
6	7
7	8
8	9
9	12
10	14
11	16
12	18
13	21
14	24
15	28
16	36
17	42
18	48
19	56
20	63
21	72
22	84
23	112
24	126
25	144
26	168
27	252
28	336
29	504
30	1008

[1,2,3,4,6,7,8,9,12,14,16,18,21,24,28,36,42,48,56, 63,72,84,112,126,144,168,252,336,504,1008]