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A180831 as a simple table

n a(n)
1 0
2 0
3 0
4 0
5 9
6 166
7 3474
8 36866
9 345458
10 2263066
11 13182593
12 61265760
13 260084494
14 944238967
15 3208593348
16 9709481260
17 27970062531
18 73672570068
19 187003944842
20 441746651920
21 1014700253185
22 2196105354893
23 4653016292528
24 9374868346319

[0,0,0,0,9,166,3474,36866,345458,2263066,13182593,
 61265760,260084494,944238967,3208593348,
 9709481260,27970062531,73672570068,187003944842,
 441746651920,1014700253185,2196105354893,
 4653016292528,9374868346319]

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Last modified August 10 16:53 EDT 2024. Contains 375058 sequences. (Running on oeis4.)