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A297501 as a simple table

n a(n)
1 4
2 31
3 110
4 531
5 2534
6 11405
7 53175
8 246040
9 1135117
10 5253716
11 24286811
12 112274796
13 519155469
14 2400230989
15 11097385328
16 51309028043
17 237225520918
18 1096808926323
19 5071081279846
20 23446053720513
21 108402467083427
22 501197081280420

[4,31,110,531,2534,11405,53175,246040,1135117,
 5253716,24286811,112274796,519155469,2400230989,
 11097385328,51309028043,237225520918,
 1096808926323,5071081279846,23446053720513,
 108402467083427,501197081280420]

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Last modified June 27 19:07 EDT 2022. Contains 354897 sequences. (Running on oeis4.)