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A305986 as a simple table

n a(n)
0 1
1 1
2 4
3 21
4 144
5 1205
6 11908
7 135597
8 1745488
9 25045821
10 396249564
11 6850289765
12 128438323720
13 2595394603269
14 56224162108468
15 1299717221807229
16 31931915643021504
17 830816659779428525
18 22820190255069409804
19 659845945466402034165
20 20034230527927369097848
21 637252918691725377815349

[1,1,4,21,144,1205,11908,135597,1745488,25045821,
 396249564,6850289765,128438323720,2595394603269,
 56224162108468,1299717221807229,31931915643021504,
 830816659779428525,22820190255069409804,
 659845945466402034165,20034230527927369097848,
 637252918691725377815349]

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Last modified March 28 18:04 EDT 2024. Contains 371254 sequences. (Running on oeis4.)