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A056780 as a simple table

n a(n)
1 1
2 2
3 3
4 9
5 21
6 68
7 208
8 730
9 2542
10 9287
11 34053
12 127112
13 476849
14 1803636
15 6851960
16 26157362
17 100211446
18 385239872
19 1485232325
20 5741327939
21 22246061118
22 86383655207
23 336093789246
24 1309999171971
25 5114453234510
26 19998176771431
27 78306018629550
28 307022197845116

[1,2,3,9,21,68,208,730,2542,9287,34053,127112,
 476849,1803636,6851960,26157362,100211446,
 385239872,1485232325,5741327939,22246061118,
 86383655207,336093789246,1309999171971,
 5114453234510,19998176771431,78306018629550,
 307022197845116]

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Last modified April 24 08:08 EDT 2024. Contains 371922 sequences. (Running on oeis4.)