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A052931 as a simple table

n a(n)
0 1
1 0
2 3
3 1
4 9
5 6
6 28
7 27
8 90
9 109
10 297
11 417
12 1000
13 1548
14 3417
15 5644
16 11799
17 20349
18 41041
19 72846
20 143472
21 259579
22 503262
23 922209
24 1769365
25 3269889
26 6230304
27 11579032
28 21960801
29 40967400
30 77461435
31 144863001
32 273351705
33 512050438
34 964918116
35 1809503019

[1,0,3,1,9,6,28,27,90,109,297,417,1000,1548,3417,
 5644,11799,20349,41041,72846,143472,259579,503262,
 922209,1769365,3269889,6230304,11579032,21960801,
 40967400,77461435,144863001,273351705,512050438,
 964918116,1809503019]

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Last modified April 19 09:18 EDT 2019. Contains 322241 sequences. (Running on oeis4.)