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A054890 as a simple table

n a(n)
1 1
2 7
3 42
4 245
5 1428
6 8323
7 48510
8 282737
9 1647912
10 9604735
11 55980498
12 326278253
13 1901689020
14 11083855867
15 64601446182
16 376524821225
17 2194547481168
18 12790760065783
19 74550012913530
20 434509317415397 

[1,7,42,245,1428,8323,48510,282737,1647912,
 9604735,55980498,326278253,1901689020,11083855867,
 64601446182,376524821225,2194547481168,
 12790760065783,74550012913530,434509317415397]

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Last modified June 5 14:50 EDT 2024. Contains 373107 sequences. (Running on oeis4.)