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A133405 as a simple table

n a(n)
0 0
1 0
2 0
3 1
4 3
5 9
6 26
7 78
8 234
9 703
10 2109
11 6327
12 18980
13 56940
14 170820
15 512461
16 1537383
17 4612149
18 13836446
19 41509338
20 124528014
21 373584043
22 1120752129
23 3362256387
24 10086769160
25 30260307480
26 90780922440
27 272342767321
28 817028301963
29 2451084905889
30 7353254717666

[0,0,0,1,3,9,26,78,234,703,2109,6327,18980,56940,
 170820,512461,1537383,4612149,13836446,41509338,
 124528014,373584043,1120752129,3362256387,
 10086769160,30260307480,90780922440,272342767321,
 817028301963,2451084905889,7353254717666]

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Last modified April 30 22:38 EDT 2024. Contains 372141 sequences. (Running on oeis4.)