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A252778 as a simple table

n a(n)
0 0
1 0
2 156
3 14298
4 228984
5 1821420
6 9676020
7 39328086
8 131914608
9 382726584
10 991134540
11 2342199090
12 5133181416
13 10561434468
14 20593784484
15 38341504110
16 68569332960
17 118371718896
18 198054533628
19 322265959434
20 511426049880
21 793510636380
22 1206251784276

[0,0,156,14298,228984,1821420,9676020,39328086,
 131914608,382726584,991134540,2342199090,
 5133181416,10561434468,20593784484,38341504110,
 68569332960,118371718896,198054533628,
 322265959434,511426049880,793510636380,
 1206251784276]

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Last modified October 1 08:39 EDT 2020. Contains 337442 sequences. (Running on oeis4.)