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A143020 as a simple table

n a(n)
2 1
3 5
4 31
5 218
6 1658
7 13293
8 110675
9 947870
10 8297926
11 73924162
12 668038006
13 6108962580
14 56426393268
15 525673683069
16 4933634156571
17 46604425575734
18 442753710351950
19 4227598589181750
20 40549714320544770
21 390522305786747820 

[1,5,31,218,1658,13293,110675,947870,8297926,
 73924162,668038006,6108962580,56426393268,
 525673683069,4933634156571,46604425575734,
 442753710351950,4227598589181750,
 40549714320544770,390522305786747820]

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Last modified April 18 20:26 EDT 2024. Contains 371781 sequences. (Running on oeis4.)