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A002537 as a simple table

n a(n)
0 1
1 1
2 4
3 11
4 23
5 79
6 148
7 533
8 977
9 3553
10 6484
11 23627
12 43079
13 157039
14 286276
15 1043669
16 1902497
17 6936001
18 12643492
19 46094987
20 84025463
21 306335887
22 558412276
23 2035832213
24 3711069041
25 13529634721
26 24662841844
27 89914587851

[1,1,4,11,23,79,148,533,977,3553,6484,23627,43079,
 157039,286276,1043669,1902497,6936001,12643492,
 46094987,84025463,306335887,558412276,2035832213,
 3711069041,13529634721,24662841844,89914587851]

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Last modified March 28 20:05 EDT 2024. Contains 371254 sequences. (Running on oeis4.)