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A058819 as a simple table

n a(n)
0 1
1 4
2 10
3 44
4 196
5 820
6 3426
7 14044
8 57376
9 233024
10 943822
11 3813004
12 15379476
13 61946644
14 249262666
15 1002159108
16 4026535936
17 16169288644
18 64901742816
19 260410648684
20 1044536098828
21 4188615725644
22 16792541414866
23 67309233561244
24 269746853382816
25 1080863910568960
26 4330384259668126

[1,4,10,44,196,820,3426,14044,57376,233024,943822,
 3813004,15379476,61946644,249262666,1002159108,
 4026535936,16169288644,64901742816,260410648684,
 1044536098828,4188615725644,16792541414866,
 67309233561244,269746853382816,1080863910568960,
 4330384259668126]

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