A300482 - OEIS

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A300482 as a simple table

n	a(n)
0	2
1	1
2	0
3	3
4	18
5	95
6	592
7	4277
8	35010
9	320589
10	3249648
11	36137959
12	437555090
13	5730924667
14	80743426272
15	1217763999465
16	19576502192898
17	334180669811993
18	6037275621582880
19	115081732852805771
20	2308342741080096402

[2,1,0,3,18,95,592,4277,35010,320589,3249648, 36137959,437555090,5730924667,80743426272, 1217763999465,19576502192898,334180669811993, 6037275621582880,115081732852805771, 2308342741080096402]