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A056259
as a simple table
n
a(n)
1
1
2
3
3
9
4
19
5
21
6
57
7
73
8
81
9
207
10
349
11
421
12
3811
13
3981
14
20923
15
23785
16
38851
17
56041
18
68503
19
74433
[1,3,9,19,21,57,73,81,207,349,421,3811,3981,20923, 23785,38851,56041,68503,74433]