A081513 - OEIS

A081513 as a simple table

n	a(n)
1	1
2	0
3	3
4	6
5	12
6	8
7	24
8	20
9	28
10	40
11	40
12	30
13	60
14	45
15	60
16	120
17	90
18	72
19	72
20	168
21	240
22	180
23	144
24	168
25	168
26	216
27	420
28	315
29	210
30	420
31	420
32	336
33	432
34	1260
35	840
36	840
37	504
38	504
39	315
40	480
41	540
42	2520
43	2520
44	1680
45	1680
46	1260
47	1260
48	1008
49	720
50	2520
51	2520
52	1890
53	1512
54	945
55	3360

[1,0,3,6,12,8,24,20,28,40,40,30,60,45,60,120,90, 72,72,168,240,180,144,168,168,216,420,315,210,420, 420,336,432,1260,840,840,504,504,315,480,540,2520, 2520,1680,1680,1260,1260,1008,720,2520,2520,1890, 1512,945,3360]