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A054491 as a simple table

n a(n)
0 1
1 6
2 23
3 86
4 321
5 1198
6 4471
7 16686
8 62273
9 232406
10 867351
11 3236998
12 12080641
13 45085566
14 168261623
15 627960926
16 2343582081
17 8746367398
18 32641887511
19 121821182646
20 454642843073
21 1696750189646
22 6332357915511
23 23632681472398

[1,6,23,86,321,1198,4471,16686,62273,232406,
 867351,3236998,12080641,45085566,168261623,
 627960926,2343582081,8746367398,32641887511,
 121821182646,454642843073,1696750189646,
 6332357915511,23632681472398]

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Last modified March 28 20:05 EDT 2024. Contains 371254 sequences. (Running on oeis4.)