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A104256 as a simple table

n a(n)
1 0
2 0
3 1
4 6
5 47
6 433
7 4826
8 63344
9 957206
10 16368226
11 312484331
12 6588211317
13 152035645781
14 3811750833515
15 103171389227156
16 2998418499414228
17 93127351040630156
18 3078376326065274609
19 107905191218919625781

[0,0,1,6,47,433,4826,63344,957206,16368226,
 312484331,6588211317,152035645781,3811750833515,
 103171389227156,2998418499414228,
 93127351040630156,3078376326065274609,
 107905191218919625781]

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Last modified May 26 02:56 EDT 2020. Contains 334613 sequences. (Running on oeis4.)