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A197666 as a simple table

n a(n)
1 3
2 9
3 22
4 71
5 217
6 642
7 1963
8 5963
9 18018
10 54753
11 166329
12 504940
13 1534985
14 4667983
15 14198968
16 43215503
17 131584139
18 400800484
19 1221337807
20 3723140135
21 11353757744
22 34635822651
23 105696236527
24 322652635812
25 985253141189
26 3009481166143

[3,9,22,71,217,642,1963,5963,18018,54753,166329,
 504940,1534985,4667983,14198968,43215503,
 131584139,400800484,1221337807,3723140135,
 11353757744,34635822651,105696236527,322652635812,
 985253141189,3009481166143]

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Last modified March 3 04:16 EST 2024. Contains 370499 sequences. (Running on oeis4.)