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A222788 as a simple table

n a(n)
1 0
2 3
3 8
4 55
5 294
6 1883
7 11920
8 78255
9 517050
10 3451712
11 23156964
12 156076271
13 1055435486
14 7157673375
15 48656943008
16 331450961443
17 2261939399694
18 15461147598417
19 105834401893220
20 725394224374344
21 4977715076045096

[0,3,8,55,294,1883,11920,78255,517050,3451712,
 23156964,156076271,1055435486,7157673375,
 48656943008,331450961443,2261939399694,
 15461147598417,105834401893220,725394224374344,
 4977715076045096]

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Last modified June 27 16:27 EDT 2022. Contains 354896 sequences. (Running on oeis4.)