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A237060 as a simple table

n a(n)
1 81
2 255
3 826
4 2823
5 9815
6 34996
7 125469
8 457125
9 1664894
10 6142099
11 22586567
12 84018940
13 311018349
14 1163797285
15 4328792462
16 16268051859
17 60722854295
18 228929149516
19 856718666317
20 3237411387189
21 12138170248222
22 45946152057331

[81,255,826,2823,9815,34996,125469,457125,1664894,
 6142099,22586567,84018940,311018349,1163797285,
 4328792462,16268051859,60722854295,228929149516,
 856718666317,3237411387189,12138170248222,
 45946152057331]

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Last modified January 28 21:04 EST 2022. Contains 350664 sequences. (Running on oeis4.)