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A081016 as a simple table

n a(n)
0 1
1 6
2 40
3 273
4 1870
5 12816
6 87841
7 602070
8 4126648
9 28284465
10 193864606
11 1328767776
12 9107509825
13 62423800998
14 427859097160
15 2932589879121
16 20100270056686
17 137769300517680
18 944284833567073
19 6472224534451830

[1,6,40,273,1870,12816,87841,602070,4126648,
 28284465,193864606,1328767776,9107509825,
 62423800998,427859097160,2932589879121,
 20100270056686,137769300517680,944284833567073,
 6472224534451830]

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Last modified October 16 03:24 EDT 2019. Contains 328038 sequences. (Running on oeis4.)