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A225020 as a simple table

n a(n)
1 81
2 253
3 759
4 2653
5 9273
6 34545
7 130067
8 502563
9 1957855
10 7707477
11 30479641
12 121049341
13 481805459
14 1921111559
15 7667874767
16 30628405561
17 122397615337
18 489285404561
19 1956323203363
20 7823125185531
21 31286692332191
22 125131311950285

[81,253,759,2653,9273,34545,130067,502563,1957855,
 7707477,30479641,121049341,481805459,1921111559,
 7667874767,30628405561,122397615337,489285404561,
 1956323203363,7823125185531,31286692332191,
 125131311950285]

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Last modified February 27 15:09 EST 2024. Contains 370376 sequences. (Running on oeis4.)