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A218670 as a simple table

n a(n)
0 1
1 1
2 2
3 7
4 26
5 116
6 556
7 2927
8 16388
9 97666
10 612136
11 4023878
12 27579410
13 196537134
14 1451102836
15 11074811191
16 87160086800
17 706055915318
18 5876662642720
19 50182337830986
20 439036984440316
21 3930618736372336
22 35970734643745496
23 336153100655220126
24 3205000520319374116

[1,1,2,7,26,116,556,2927,16388,97666,612136,
 4023878,27579410,196537134,1451102836,11074811191,
 87160086800,706055915318,5876662642720,
 50182337830986,439036984440316,3930618736372336,
 35970734643745496,336153100655220126,
 3205000520319374116]

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Last modified April 24 12:51 EDT 2024. Contains 371943 sequences. (Running on oeis4.)