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A196557 as a simple table

n a(n)
0 1
1 4
2 20
3 128
4 1036
5 10308
6 122560
7 1701092
8 27053556
9 485683128
10 9723771156
11 214934627476
12 5201286731560
13 136818097071820
14 3888121468512308
15 118737900886653664
16 3878569457507036988
17 134960059001226137588
18 4984357865462772982112

[1,4,20,128,1036,10308,122560,1701092,27053556,
 485683128,9723771156,214934627476,5201286731560,
 136818097071820,3888121468512308,
 118737900886653664,3878569457507036988,
 134960059001226137588,4984357865462772982112]

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Last modified March 28 08:00 EDT 2024. Contains 371235 sequences. (Running on oeis4.)