A348209 - OEIS

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A348209 as a simple table

n	a(n)
2	1
3	5
4	0
5	34
6	33
7	20
8	0
9	1689
10	7386
11	1971
12	34180
13	43983
14	262717
15	37576
16	0
17	617963
18	2818633
19	2136492
20	5325278
21	140997161
22	572340185
23	1140209730
24	800810806
25	5573697257
26	6694155083
27	15533636306
28	220798644390

[1,5,0,34,33,20,0,1689,7386,1971,34180,43983, 262717,37576,0,617963,2818633,2136492,5325278, 140997161,572340185,1140209730,800810806, 5573697257,6694155083,15533636306,220798644390]