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A228987 as a simple table

n a(n)
0 1
1 1
2 3
3 13
4 66
5 364
6 2116
7 12768
8 79222
9 502297
10 3240120
11 21196593
12 140295584
13 937787728
14 6321624862
15 42926227470
16 293350136170
17 2015999854478
18 13923926272607
19 96598395025615
20 672852440805930
21 4703751150849738
22 32991286060134402
23 232091541493091566

[1,1,3,13,66,364,2116,12768,79222,502297,3240120,
 21196593,140295584,937787728,6321624862,
 42926227470,293350136170,2015999854478,
 13923926272607,96598395025615,672852440805930,
 4703751150849738,32991286060134402,
 232091541493091566]

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Last modified April 18 14:42 EDT 2024. Contains 371780 sequences. (Running on oeis4.)