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A026756 as a simple table

n a(n)
0 1
1 3
2 8
3 18
4 42
5 90
6 204
7 432
8 972
9 2052
10 4610
11 9726
12 21859
13 46125
14 103783
15 219099
16 493699
17 1042899
18 2353716
19 4975350
20 11247138
21 23790714
22 53867343
23 114020601
24 258571256
25 547672566
26 1243848888
27 2636201532
28 5995717860

[1,3,8,18,42,90,204,432,972,2052,4610,9726,21859,
 46125,103783,219099,493699,1042899,2353716,
 4975350,11247138,23790714,53867343,114020601,
 258571256,547672566,1243848888,2636201532,
 5995717860]

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Last modified April 19 08:20 EDT 2024. Contains 371782 sequences. (Running on oeis4.)