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A303361 as a simple table

n a(n)
0 1
1 2
2 10
3 60
4 262
5 1372
6 7044
7 32760
8 153670
9 789676
10 3659820
11 17109320
12 83073180
13 381273240
14 1786996424
15 8604391920
16 38832248902
17 179714213580
18 845485079580
19 3834271942440
20 17666638985652
21 81920437065288
22 370224975781560
23 1685489994025360

[1,2,10,60,262,1372,7044,32760,153670,789676,
 3659820,17109320,83073180,381273240,1786996424,
 8604391920,38832248902,179714213580,845485079580,
 3834271942440,17666638985652,81920437065288,
 370224975781560,1685489994025360]

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Last modified January 16 09:13 EST 2021. Contains 340204 sequences. (Running on oeis4.)