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A220702
as a simple table
n
a(n)
1
1
2
2
3
3
4
4
5
6
6
19
7
23
8
63
9
76
10
508
11
561
12
839
13
894
14
1389
15
2513
16
3436
17
6121
18
7412
19
8418
20
9184
[1,2,3,4,6,19,23,63,76,508,561,839,894,1389,2513, 3436,6121,7412,8418,9184]