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A149020 as a simple table

n a(n)
0 1
1 1
2 3
3 9
4 36
5 116
6 512
7 1904
8 8553
9 33148
10 153051
11 618001
12 2903351
13 12003571
14 57034787
15 240562562
16 1152190595
17 4930768743
18 23767357634
19 102908808435
20 498548562369
21 2179095365755
22 10599171311027
23 46692794429830
24 227853978702230
25 1010419577564144
26 4943978183011294
27 22047829680652239

[1,1,3,9,36,116,512,1904,8553,33148,153051,618001,
 2903351,12003571,57034787,240562562,1152190595,
 4930768743,23767357634,102908808435,498548562369,
 2179095365755,10599171311027,46692794429830,
 227853978702230,1010419577564144,4943978183011294,
 22047829680652239]

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Last modified April 19 17:39 EDT 2024. Contains 371797 sequences. (Running on oeis4.)