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A221115 as a simple table

n a(n)
1 0
2 0
3 8
4 178
5 2952
6 45842
7 693362
8 10369358
9 154285828
10 2290284810
11 33961683620
12 503356596054
13 7458718434538
14 110511504732170
15 1637306438141992
16 24257322689168866
17 359377884945226688
18 5324242140141530362

[0,0,8,178,2952,45842,693362,10369358,154285828,
 2290284810,33961683620,503356596054,7458718434538,
 110511504732170,1637306438141992,
 24257322689168866,359377884945226688,
 5324242140141530362]

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Last modified March 28 14:13 EDT 2024. Contains 371254 sequences. (Running on oeis4.)