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A188116 as a simple table

n a(n)
1 0
2 3
3 4
4 16
5 42
6 137
7 426
8 1398
9 4622
10 15594
11 53252
12 184060
13 642392
14 2261829
15 8024726
16 28664946
17 103015222
18 372234190
19 1351655526
20 4930080182
21 18055480464
22 66371559466
23 244817099870
24 905883648170
25 3361795172242
26 12509691344838

[0,3,4,16,42,137,426,1398,4622,15594,53252,184060,
 642392,2261829,8024726,28664946,103015222,
 372234190,1351655526,4930080182,18055480464,
 66371559466,244817099870,905883648170,
 3361795172242,12509691344838]

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Last modified April 18 20:10 EDT 2024. Contains 371781 sequences. (Running on oeis4.)