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A154147 as a simple table

n a(n)
1 3
2 9
3 30
4 60
5 179
6 353
7 1046
8 2060
9 6099
10 12009
11 35550
12 69996
13 207203
14 407969
15 1207670
16 2377820
17 7038819
18 13858953
19 41025246
20 80775900
21 239112659
22 470796449
23 1393650710
24 2744002796
25 8122791603
26 15993220329
27 47343098910
28 93215319180
29 275935801859

[3,9,30,60,179,353,1046,2060,6099,12009,35550,
 69996,207203,407969,1207670,2377820,7038819,
 13858953,41025246,80775900,239112659,470796449,
 1393650710,2744002796,8122791603,15993220329,
 47343098910,93215319180,275935801859]

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Last modified March 28 22:04 EDT 2024. Contains 371254 sequences. (Running on oeis4.)