A257372 - OEIS

A257372 as a simple table

n	a(n)
0	1
1	6
2	6
3	15
4	30
5	21
6	42
7	15
8	30
9	33
10	66
11	1365
12	2730
13	3
14	6
15	255
16	510
17	399
18	798
19	165
20	330
21	69
22	138
23	1365
24	2730
25	3
26	6
27	435
28	870
29	7161
30	14322
31	255
32	510
33	3
34	6
35	959595
36	1919190
37	3
38	6
39	6765
40	13530
41	903
42	1806
43	345
44	690

[1,6,6,15,30,21,42,15,30,33,66,1365,2730,3,6,255, 510,399,798,165,330,69,138,1365,2730,3,6,435,870, 7161,14322,255,510,3,6,959595,1919190,3,6,6765, 13530,903,1806,345,690]