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A005572 as a simple table

n a(n)
0 1
1 4
2 17
3 76
4 354
5 1704
6 8421
7 42508
8 218318
9 1137400
10 5996938
11 31940792
12 171605956
13 928931280
14 5061593709
15 27739833228
16 152809506582
17 845646470616
18 4699126915422
19 26209721959656
20 146681521121244
21 823429928805936

[1,4,17,76,354,1704,8421,42508,218318,1137400,
 5996938,31940792,171605956,928931280,5061593709,
 27739833228,152809506582,845646470616,
 4699126915422,26209721959656,146681521121244,
 823429928805936]

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Last modified April 19 18:00 EDT 2024. Contains 371797 sequences. (Running on oeis4.)