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A334976 as a simple table

n a(n)
0 0
1 0
2 3
3 19
4 108
5 609
6 3468
7 20007
8 116886
9 690690
10 4122495
11 24823188
12 150629248
13 920274804
14 5656456104
15 34954487967
16 217044280458
17 1353539406660
18 8474029162305
19 53241343026795
20 335592121524660
21 2121577490385885
22 13448859209014320
23 85467026778421860

[0,0,3,19,108,609,3468,20007,116886,690690,
 4122495,24823188,150629248,920274804,5656456104,
 34954487967,217044280458,1353539406660,
 8474029162305,53241343026795,335592121524660,
 2121577490385885,13448859209014320,
 85467026778421860]

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Last modified May 25 19:19 EDT 2022. Contains 354071 sequences. (Running on oeis4.)