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A217324 as a simple table

n a(n)
4 1
5 4
6 19
7 69
8 265
9 929
10 3356
11 11626
12 41117
13 142206
14 499836
15 1734328
16 6099193
17 21282265
18 75125770
19 263906332
20 936517637
21 3313246237
22 11827430209
23 42139231729
24 151339387003
25 542857007499
26 1961171657524
27 7079621540798
28 25720257983591
29 93396276789196

[1,4,19,69,265,929,3356,11626,41117,142206,499836,
 1734328,6099193,21282265,75125770,263906332,
 936517637,3313246237,11827430209,42139231729,
 151339387003,542857007499,1961171657524,
 7079621540798,25720257983591,93396276789196]

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Last modified March 29 11:14 EDT 2024. Contains 371278 sequences. (Running on oeis4.)