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A055687 as a simple table

n a(n)
1 2
2 18
3 4098
4 7362
5 85074
6 658530
7 3999138
8 72281282
9 285143058
10 628944690
11 854112114
12 1423081170
13 2561019282
14 3111576930
15 4298117634
16 5921265042
17 14224884930
18 21336998130
19 34317377234
20 50723421714
21 63797137890
22 144269032050
23 163834314354
24 187397322210
25 212565453282
26 231286579794
27 232992827298
28 266198715090
29 314834584482
30 348160787730
31 580045717650
32 706501722498

[2,18,4098,7362,85074,658530,3999138,72281282,
 285143058,628944690,854112114,1423081170,
 2561019282,3111576930,4298117634,5921265042,
 14224884930,21336998130,34317377234,50723421714,
 63797137890,144269032050,163834314354,
 187397322210,212565453282,231286579794,
 232992827298,266198715090,314834584482,
 348160787730,580045717650,706501722498]

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Last modified September 25 07:19 EDT 2022. Contains 356959 sequences. (Running on oeis4.)