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A045992 as a simple table

n a(n)
0 1
1 1
2 4
3 17
4 66
5 247
6 918
7 3425
8 12862
9 48611
10 184746
11 705421
12 2704144
13 10400587
14 40116586
15 155117505
16 601080374
17 2333606203
18 9075135282
19 35345263781
20 137846528800
21 538257874419
22 2104098963698
23 8233430727577
24 32247603683076

[1,1,4,17,66,247,918,3425,12862,48611,184746,
 705421,2704144,10400587,40116586,155117505,
 601080374,2333606203,9075135282,35345263781,
 137846528800,538257874419,2104098963698,
 8233430727577,32247603683076]

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Last modified April 25 03:15 EDT 2024. Contains 371964 sequences. (Running on oeis4.)