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A206180 as a simple table

n a(n)
0 1
1 4
2 34
3 352
4 3946
5 46744
6 573616
7 7217536
8 92527738
9 1203467464
10 15834369244
11 210304283776
12 2815055712496
13 37930536447808
14 513972867056704
15 6998587355233792
16 95704396144575898
17 1313665229153722408
18 18091969874675059204
19 249908773119244105792 

[1,4,34,352,3946,46744,573616,7217536,92527738,
 1203467464,15834369244,210304283776,2815055712496,
 37930536447808,513972867056704,6998587355233792,
 95704396144575898,1313665229153722408,
 18091969874675059204,249908773119244105792]

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Last modified June 8 07:10 EDT 2024. Contains 373207 sequences. (Running on oeis4.)