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A002464 as a simple table

n a(n)
0 1
1 1
2 0
3 0
4 2
5 14
6 90
7 646
8 5242
9 47622
10 479306
11 5296790
12 63779034
13 831283558
14 11661506218
15 175203184374
16 2806878055610
17 47767457130566
18 860568917787402
19 16362838542699862
20 327460573946510746
21 6880329406055690790
22 151436547414562736234
23 3484423186862152966838

[1,1,0,0,2,14,90,646,5242,47622,479306,5296790,
 63779034,831283558,11661506218,175203184374,
 2806878055610,47767457130566,860568917787402,
 16362838542699862,327460573946510746,
 6880329406055690790,151436547414562736234,
 3484423186862152966838]

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Last modified April 4 05:15 EDT 2020. Contains 333212 sequences. (Running on oeis4.)