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A244787 as a simple table

n a(n)
1 4
2 26
3 166
4 1116
5 7730
6 54842
7 396488
8 2909656
9 21610932
10 162100016
11 1225834896
12 8922787256
13 67040518864
14 509020798128
15 3892934735724
16 29936839485280
17 223995395536680
18 1713567578188868
19 13203130087417636
20 102232099278447604

[4,26,166,1116,7730,54842,396488,2909656,21610932,
 162100016,1225834896,8922787256,67040518864,
 509020798128,3892934735724,29936839485280,
 223995395536680,1713567578188868,
 13203130087417636,102232099278447604]

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Last modified April 24 00:30 EDT 2024. Contains 371917 sequences. (Running on oeis4.)