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A236791 as a simple table

n a(n)
1 81
2 255
3 825
4 2817
5 9717
6 34317
7 122305
8 442285
9 1612085
10 5935493
11 21990145
12 82051485
13 307574133
14 1158698629
15 4379531169
16 16610367645
17 63145291189
18 240620562981
19 918393173569
20 3511019670621
21 13437773070709
22 51488379790533

[81,255,825,2817,9717,34317,122305,442285,1612085,
 5935493,21990145,82051485,307574133,1158698629,
 4379531169,16610367645,63145291189,240620562981,
 918393173569,3511019670621,13437773070709,
 51488379790533]

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Last modified January 24 22:45 EST 2022. Contains 350565 sequences. (Running on oeis4.)