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A018034 as a simple table

n a(n)
0 1
1 3
2 7
3 20
4 54
5 147
6 400
7 1086
8 2947
9 8000
10 21715
11 58945
12 160000
13 434307
14 1178890
15 3200000
16 8686136
17 23577802
18 64000000
19 173722727
20 471556032
21 1280000000
22 3474454549
23 9431120637
24 25600000000
25 69489090985
26 188622412730
27 512000000000
28 1389781819697

[1,3,7,20,54,147,400,1086,2947,8000,21715,58945,
 160000,434307,1178890,3200000,8686136,23577802,
 64000000,173722727,471556032,1280000000,
 3474454549,9431120637,25600000000,69489090985,
 188622412730,512000000000,1389781819697]

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Last modified March 28 05:39 EDT 2024. Contains 371235 sequences. (Running on oeis4.)