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A218212 as a simple table

n a(n)
1 0
2 0
3 4
4 14
5 29
6 78
7 225
8 632
9 1716
10 4726
11 13482
12 38627
13 112051
14 327426
15 959254
16 2829346
17 8391477
18 24975616
19 74606489
20 223523560
21 671611810 

[0,0,4,14,29,78,225,632,1716,4726,13482,38627,
 112051,327426,959254,2829346,8391477,24975616,
 74606489,223523560,671611810]

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Last modified April 25 12:33 EDT 2024. Contains 371969 sequences. (Running on oeis4.)