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A188114 as a simple table

n a(n)
1 0
2 1
3 0
4 3
5 4
6 16
7 42
8 137
9 426
10 1398
11 4622
12 15594
13 53252
14 184060
15 642392
16 2261829
17 8024726
18 28664946
19 103015222
20 372234190
21 1351655526
22 4930080182
23 18055480464
24 66371559466
25 244817099870
26 905883648170
27 3361795172242
28 12509691344838

[0,1,0,3,4,16,42,137,426,1398,4622,15594,53252,
 184060,642392,2261829,8024726,28664946,103015222,
 372234190,1351655526,4930080182,18055480464,
 66371559466,244817099870,905883648170,
 3361795172242,12509691344838]

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Last modified April 18 22:18 EDT 2024. Contains 371782 sequences. (Running on oeis4.)