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A207767 as a simple table

n a(n)
1 31
2 961
3 2305
4 17563
5 67330
6 178627
7 887114
8 3733566
9 11979209
10 49800326
11 208738438
12 742476229
13 2900533473
14 11843654162
15 44397947317
16 170655647841
17 681016789541
18 2614418854083
19 10044216333681
20 39503065976101

[31,961,2305,17563,67330,178627,887114,3733566,
 11979209,49800326,208738438,742476229,2900533473,
 11843654162,44397947317,170655647841,681016789541,
 2614418854083,10044216333681,39503065976101]

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Last modified October 21 18:36 EDT 2021. Contains 348155 sequences. (Running on oeis4.)