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A241671
as a simple table
n
a(n)
1
2
2
4
3
8
4
17
5
39
6
43
7
799
8
823
9
1127
10
1136
11
1575
12
1822
13
3114
14
4926
15
7576
16
18574
17
137489
18
1058844
19
1246046
[2,4,8,17,39,43,799,823,1127,1136,1575,1822,3114, 4926,7576,18574,137489,1058844,1246046]