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A215690 as a simple table

n a(n)
0 1
1 9
2 27
3 81
4 198
5 459
6 972
7 1989
8 3861
9 7290
10 13284
11 23679
12 41148
13 70218
14 117504
15 193671
16 314262
17 503415
18 796068
19 1244988
20 1925910
21 2950668
22 4478328
23 6739497
24 10059228
25 14901471
26 21914442
27 32011119
28 46456272
29 67010679
30 96093864
31 137039922
32 194395221

[1,9,27,81,198,459,972,1989,3861,7290,13284,23679,
 41148,70218,117504,193671,314262,503415,796068,
 1244988,1925910,2950668,4478328,6739497,10059228,
 14901471,21914442,32011119,46456272,67010679,
 96093864,137039922,194395221]

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Last modified June 23 12:08 EDT 2021. Contains 345401 sequences. (Running on oeis4.)