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A027076 as a simple table

n a(n)
0 1
1 4
2 13
3 38
4 111
5 326
6 961
7 2842
8 8425
9 25020
10 74403
11 221488
12 659895
13 1967422
14 5869055
15 17516540
16 52300729
17 156214828
18 466736979
19 1394894672
20 4169810935
21 12467680862
22 37285474803
23 111524444760
24 333633526937
25 998233861836

[1,4,13,38,111,326,961,2842,8425,25020,74403,
 221488,659895,1967422,5869055,17516540,52300729,
 156214828,466736979,1394894672,4169810935,
 12467680862,37285474803,111524444760,333633526937,
 998233861836]

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Last modified June 10 22:09 EDT 2024. Contains 373280 sequences. (Running on oeis4.)