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A001673 as a simple table

n a(n)
0 1
1 4
2 10
3 32
4 98
5 307
6 962
7 3021
8 9489
9 29810
10 93649
11 294205
12 924270
13 2903678
14 9122172
15 28658146
16 90032221
17 282844564
18 888582404
19 2791563950
20 8769956797
21 27551631843
22 86556004192
23 271923706894
24 854273519914
25 2683779414318
26 8431341691877
27 26487841119104

[1,4,10,32,98,307,962,3021,9489,29810,93649,
 294205,924270,2903678,9122172,28658146,90032221,
 282844564,888582404,2791563950,8769956797,
 27551631843,86556004192,271923706894,854273519914,
 2683779414318,8431341691877,26487841119104]

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Last modified June 17 17:05 EDT 2021. Contains 345085 sequences. (Running on oeis4.)