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A187865 as a simple table

n a(n)
1 0
2 0
3 0
4 219008
5 6387404
6 38766870
7 133665550
8 327612556
9 658127610
10 1150253908
11 1821396586
12 2678117739
13 3721029612
14 4946379865
15 6353213493
16 7935533922
17 9694577705
18 11627337878
19 13734354068
20 16015165378
21 18469771808
22 21098173358

[0,0,0,219008,6387404,38766870,133665550,
 327612556,658127610,1150253908,1821396586,
 2678117739,3721029612,4946379865,6353213493,
 7935533922,9694577705,11627337878,13734354068,
 16015165378,18469771808,21098173358]

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Last modified March 28 16:12 EDT 2024. Contains 371254 sequences. (Running on oeis4.)