A033688 - OEIS

A033688 as a simple table

n	a(n)
0	1
1	0
2	0
3	0
4	54
5	0
6	108
7	216
8	0
9	240
10	756
11	0
12	486
13	1512
14	0
15	1512
16	3078
17	0
18	2160
19	4536
20	0
21	1944
22	7992
23	0
24	7020
25	10584
26	0
27	6720
28	16848
29	0
30	6804
31	19656
32	0
33	15984
34	29484
35	0
36	17520
37	33696
38	0
39	13608
40	49140
41	0
42	37152
43	53352
44	0
45	30240
46	73008
47	0
48	27702
49	78624
50	0
51	58968

[1,0,0,0,54,0,108,216,0,240,756,0,486,1512,0,1512, 3078,0,2160,4536,0,1944,7992,0,7020,10584,0,6720, 16848,0,6804,19656,0,15984,29484,0,17520,33696,0, 13608,49140,0,37152,53352,0,30240,73008,0,27702, 78624,0,58968]