A151791 - OEIS

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A151791 as a simple table

n	a(n)
1	1
2	7
3	7
4	42
5	7
6	42
7	42
8	252
9	7
10	42
11	42
12	252
13	42
14	252
15	252
16	1512
17	7
18	42
19	42
20	252
21	42
22	252
23	252
24	1512
25	42
26	252
27	252
28	1512
29	252
30	1512
31	1512
32	9072
33	7
34	42
35	42
36	252
37	42
38	252
39	252
40	1512
41	42
42	252
43	252
44	1512
45	252
46	1512
47	1512
48	9072
49	42
50	252
51	252
52	1512
53	252
54	1512
55	1512
56	9072
57	252

[1,7,7,42,7,42,42,252,7,42,42,252,42,252,252,1512, 7,42,42,252,42,252,252,1512,42,252,252,1512,252, 1512,1512,9072,7,42,42,252,42,252,252,1512,42,252, 252,1512,252,1512,1512,9072,42,252,252,1512,252, 1512,1512,9072,252]