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A167105 as a simple table

n a(n)
0 1
1 4
2 12
3 36
4 108
5 324
6 972
7 2916
8 8748
9 26244
10 78732
11 236196
12 708588
13 2125764
14 6377286
15 19131840
16 57395472
17 172186272
18 516558384
19 1549673856
20 4649017680
21 13947041376
22 41841089136
23 125523162432
24 376569172368
25 1129706572320

[1,4,12,36,108,324,972,2916,8748,26244,78732,
 236196,708588,2125764,6377286,19131840,57395472,
 172186272,516558384,1549673856,4649017680,
 13947041376,41841089136,125523162432,376569172368,
 1129706572320]

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Last modified May 15 11:50 EDT 2024. Contains 372540 sequences. (Running on oeis4.)