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A030053 as a simple table

n a(n)
3 1
4 9
5 55
6 286
7 1365
8 6188
9 27132
10 116280
11 490314
12 2042975
13 8436285
14 34597290
15 141120525
16 573166440
17 2319959400
18 9364199760
19 37711260990
20 151584480450
21 608359048206
22 2438362177020
23 9762479679106
24 39049918716424
25 156077261327400
26 623404249591760

[1,9,55,286,1365,6188,27132,116280,490314,2042975,
 8436285,34597290,141120525,573166440,2319959400,
 9364199760,37711260990,151584480450,608359048206,
 2438362177020,9762479679106,39049918716424,
 156077261327400,623404249591760]

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Last modified March 28 22:04 EDT 2024. Contains 371254 sequences. (Running on oeis4.)