A023924 - OEIS

A023924 as a simple table

n	a(n)
0	1
1	0
2	0
3	0
4	0
5	0
6	26
7	0
8	0
9	0
10	0
11	156
12	0
13	156
14	0
15	572
16	0
17	0
18	1430
19	1716
20	2574
21	3432
22	0
23	0
24	5746
25	0
26	4290
27	0
28	13182
29	0
30	0
31	22308
32	26052
33	29744
34	33462
35	0
36	0
37	54912
38	0
39	36036
40	0
41	89232
42	0
43	0
44	123708
45	143000
46	156156
47	178464
48	0
49	0
50	234234
51	0
52	141726
53	0
54	348374
55	0

[1,0,0,0,0,0,26,0,0,0,0,156,0,156,0,572,0,0,1430, 1716,2574,3432,0,0,5746,0,4290,0,13182,0,0,22308, 26052,29744,33462,0,0,54912,0,36036,0,89232,0,0, 123708,143000,156156,178464,0,0,234234,0,141726,0, 348374,0]