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A121545 as a simple table

n a(n)
0 0
1 1
2 1
3 4
4 17
5 81
6 412
7 2192
8 12049
9 67891
10 390041
11 2276176
12 13455356
13 80402284
14 484865032
15 2947107384
16 18036248337
17 111046920567
18 687345582787
19 4274642610932
20 26697307240777
21 167377288848977

[0,1,1,4,17,81,412,2192,12049,67891,390041,
 2276176,13455356,80402284,484865032,2947107384,
 18036248337,111046920567,687345582787,
 4274642610932,26697307240777,167377288848977]

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Last modified April 24 03:08 EDT 2024. Contains 371918 sequences. (Running on oeis4.)