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A330054 as a simple table

n a(n)
0 1
1 0
2 0
3 0
4 1
5 0
6 4
7 4
8 16
9 26
10 87
11 181
12 570
13 1453
14 4464
15 13038
16 41548
17 132217
18 442603
19 1506803
20 5305174
21 19092816
22 70548770
23 266495254
24 1029835424
25 4063610148
26 16366919221
27 67217627966
28 281326631801
29 1199048810660
30 5201341196693
31 22950740113039
32 102957953031700

[1,0,0,0,1,0,4,4,16,26,87,181,570,1453,4464,13038,
 41548,132217,442603,1506803,5305174,19092816,
 70548770,266495254,1029835424,4063610148,
 16366919221,67217627966,281326631801,
 1199048810660,5201341196693,22950740113039,
 102957953031700]

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Last modified April 24 20:08 EDT 2024. Contains 371963 sequences. (Running on oeis4.)