A281888 - OEIS

A281888 as a simple table

n	a(n)
1	0
2	0
3	0
4	0
5	0
6	0
7	0
8	0
9	0
10	0
11	0
12	0
13	68
14	0
15	0
16	0
17	0
18	638
19	638
20	0
21	0
22	0
23	0
24	4832
25	9284
26	4832
27	0
28	0
29	0
30	0
31	35002
32	112320
33	112320
34	35002
35	0
36	0
37	0
38	0
39	241209
40	1282388
41	2156646
42	1282388
43	241209
44	0
45	0
46	0
47	0
48	1612568
49	13907664
50	38763782
51	38763782
52	13907664
53	1612568
54	0
55	0

[0,0,0,0,0,0,0,0,0,0,0,0,68,0,0,0,0,638,638,0,0,0, 0,4832,9284,4832,0,0,0,0,35002,112320,112320, 35002,0,0,0,0,241209,1282388,2156646,1282388, 241209,0,0,0,0,1612568,13907664,38763782,38763782, 13907664,1612568,0,0]