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A324765
as a simple table
n
a(n)
1
1
2
1
3
2
4
3
5
6
6
11
7
26
8
52
9
119
10
266
11
618
12
1432
13
3402
14
8093
15
19505
16
47228
17
115244
18
282529
19
696388
20
1723400
[1,1,2,3,6,11,26,52,119,266,618,1432,3402,8093, 19505,47228,115244,282529,696388,1723400]