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A186186 as a simple table

n a(n)
0 1
1 1
2 3
3 12
4 63
5 403
6 2919
7 22833
8 187799
9 1599718
10 13984383
11 124717327
12 1130144932
13 10375309228
14 96290993853
15 901915801437
16 8514822062757
17 80939662475426
18 774025387921462
19 7441380898249458
20 71879194326339456
21 697253570563306939
22 6789448668631285664
23 66340474776507262638

[1,1,3,12,63,403,2919,22833,187799,1599718,
 13984383,124717327,1130144932,10375309228,
 96290993853,901915801437,8514822062757,
 80939662475426,774025387921462,7441380898249458,
 71879194326339456,697253570563306939,
 6789448668631285664,66340474776507262638]

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Last modified July 27 04:47 EDT 2021. Contains 346305 sequences. (Running on oeis4.)