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A215252 as a simple table

n a(n)
0 0
1 1
2 1
3 3
4 12
5 56
6 289
7 1602
8 9367
9 57075
10 359346
11 2323416
12 15356446
13 103389175
14 707107627
15 4901988047
16 34384943850
17 243694702311
18 1742953208739
19 12567593026554
20 91280392585747
21 667341975412356
22 4907899368783645
23 36289929612761691
24 269660272111724536
25 2012845416966620068
26 15087243969226496324
27 113521159338891300347
28 857211201390859034536

[0,1,1,3,12,56,289,1602,9367,57075,359346,2323416,
 15356446,103389175,707107627,4901988047,
 34384943850,243694702311,1742953208739,
 12567593026554,91280392585747,667341975412356,
 4907899368783645,36289929612761691,
 269660272111724536,2012845416966620068,
 15087243969226496324,113521159338891300347,
 857211201390859034536]

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Last modified April 24 07:35 EDT 2024. Contains 371922 sequences. (Running on oeis4.)