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A078844 as a simple table

n a(n)
0 1
1 3
2 9
3 30
4 90
5 269
6 788
7 2249
8 6340
9 17526
10 47911
11 129639
12 348251
13 929714
14 2469499
15 6532869
16 17219031
17 45246630
18 118572805
19 309998131
20 808746993
21 2105893899
22 5474080107
23 14207001052
24 36818679828
25 95292132897
26 246327403310

[1,3,9,30,90,269,788,2249,6340,17526,47911,129639,
 348251,929714,2469499,6532869,17219031,45246630,
 118572805,309998131,808746993,2105893899,
 5474080107,14207001052,36818679828,95292132897,
 246327403310]

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Last modified March 8 00:38 EST 2021. Contains 341934 sequences. (Running on oeis4.)