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A049426 as a simple table

n a(n)
0 1
1 1
2 4
3 16
4 76
5 436
6 2776
7 19384
8 148576
9 1226656
10 10824256
11 101695936
12 1010783104
13 10577428096
14 116166090496
15 1334409569536
16 15985101216256
17 199216504113664
18 2577292524107776
19 34542575915216896
20 478781761481291776

[1,1,4,16,76,436,2776,19384,148576,1226656,
 10824256,101695936,1010783104,10577428096,
 116166090496,1334409569536,15985101216256,
 199216504113664,2577292524107776,
 34542575915216896,478781761481291776]

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Last modified May 7 10:46 EDT 2021. Contains 343650 sequences. (Running on oeis4.)