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A191007 as a simple table

n a(n)
0 3
1 9
2 27
3 69
4 171
5 405
6 939
7 2133
8 4779
9 10581
10 23211
11 50517
12 109227
13 234837
14 502443
15 1070421
16 2271915
17 4805973
18 10136235
19 21321045
20 44739243
21 93672789
22 195734187
23 408245589
24 850045611
25 1767200085
26 3668617899
27 7605671253
28 15748213419
29 32570168661
30 67287820971

[3,9,27,69,171,405,939,2133,4779,10581,23211,
 50517,109227,234837,502443,1070421,2271915,
 4805973,10136235,21321045,44739243,93672789,
 195734187,408245589,850045611,1767200085,
 3668617899,7605671253,15748213419,32570168661,
 67287820971]

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Last modified April 23 13:04 EDT 2024. Contains 371913 sequences. (Running on oeis4.)