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A219384 as a simple table

n a(n)
1 15
2 53
3 344
4 2275
5 11861
6 60738
7 278221
8 1210223
9 4982663
10 19591906
11 73766878
12 266405385
13 926295032
14 3109222072
15 10103620683
16 31853913050
17 97605116782
18 291102100195
19 846145644323
20 2399919368153
21 6649637316141
22 18018812905279 

[15,53,344,2275,11861,60738,278221,1210223,
 4982663,19591906,73766878,266405385,926295032,
 3109222072,10103620683,31853913050,97605116782,
 291102100195,846145644323,2399919368153,
 6649637316141,18018812905279]

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Last modified April 19 19:02 EDT 2024. Contains 371798 sequences. (Running on oeis4.)