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A279971 as a simple table

n a(n)
1 1
2 3
3 9
4 31
5 108
6 366
7 1205
8 3873
9 12207
10 37859
11 115842
12 350412
13 1049545
14 3116655
15 9185349
16 26890375
17 78253896
18 226510362
19 652483133
20 1871302893
21 5345409483
22 15213423371
23 43153001406
24 122024489304
25 344061371665
26 967537410459

[1,3,9,31,108,366,1205,3873,12207,37859,115842,
 350412,1049545,3116655,9185349,26890375,78253896,
 226510362,652483133,1871302893,5345409483,
 15213423371,43153001406,122024489304,344061371665,
 967537410459]

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Last modified August 15 16:02 EDT 2020. Contains 336505 sequences. (Running on oeis4.)