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A318011 as a simple table

n a(n)
1 4
2 28
3 118
4 508
5 2130
6 8971
7 37700
8 158613
9 667178
10 2806643
11 11806334
12 49664719
13 208919728
14 878843413
15 3696948061
16 15551606501
17 65419489183
18 275194053961
19 1157633112776
20 4869707055676
21 20484941672721
22 86172090154282

[4,28,118,508,2130,8971,37700,158613,667178,
 2806643,11806334,49664719,208919728,878843413,
 3696948061,15551606501,65419489183,275194053961,
 1157633112776,4869707055676,20484941672721,
 86172090154282]

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Last modified April 23 13:11 EDT 2024. Contains 371913 sequences. (Running on oeis4.)