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A275038 as a simple table

n a(n)
1 3
2 18
3 46
4 137
5 401
6 1152
7 3336
8 9720
9 28277
10 82174
11 238829
12 694135
13 2017380
14 5863430
15 17042197
16 49533046
17 143966504
18 418434888
19 1216170841
20 3534771986
21 10273734201
22 29860375290
23 86788495974
24 252248762928
25 733155217213

[3,18,46,137,401,1152,3336,9720,28277,82174,
 238829,694135,2017380,5863430,17042197,49533046,
 143966504,418434888,1216170841,3534771986,
 10273734201,29860375290,86788495974,252248762928,
 733155217213]

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Last modified March 28 16:12 EDT 2024. Contains 371254 sequences. (Running on oeis4.)