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A126375 as a simple table

n a(n)
0 1
1 21
2 61
3 179
4 527
5 1555
6 4595
7 13593
8 40245
9 119235
10 353459
11 1048285
12 3110249
13 9231305
14 27407185
15 81392387
16 241773327
17 718335747
18 2134675683
19 6344739309
20 18861068265
21 56076828573
22 166747755621
23 495896780609
24 1474935978225

[1,21,61,179,527,1555,4595,13593,40245,119235,
 353459,1048285,3110249,9231305,27407185,81392387,
 241773327,718335747,2134675683,6344739309,
 18861068265,56076828573,166747755621,495896780609,
 1474935978225]

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Last modified December 4 23:46 EST 2022. Contains 358572 sequences. (Running on oeis4.)