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A250447 as a simple table

n a(n)
1 44
2 217
3 1000
4 4535
5 20242
6 89677
7 395240
8 1736779
9 7617286
10 33369545
11 146077396
12 639173575
13 2795963426
14 12228336613
15 53475556816
16 233837032739
17 1022474657182
18 4470747289345
19 19547912489996
20 85470468806527
21 373705021918234

[44,217,1000,4535,20242,89677,395240,1736779,
 7617286,33369545,146077396,639173575,2795963426,
 12228336613,53475556816,233837032739,
 1022474657182,4470747289345,19547912489996,
 85470468806527,373705021918234]

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Last modified January 24 13:48 EST 2022. Contains 350538 sequences. (Running on oeis4.)