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A038805
as a simple table
n
a(n)
1
1
2
4
3
9
4
21
5
24
6
34
7
56
8
66
9
92
10
100
11
112
12
117
13
135
14
180
15
260
16
349
17
387
18
393
19
411
20
574
21
617
22
787
23
1209
[1,4,9,21,24,34,56,66,92,100,112,117,135,180,260, 349,387,393,411,574,617,787,1209]