A274331 - OEIS

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A274331 as a simple table

n	a(n)
1	2
2	3
3	4
4	5
5	9
6	27
7	35
8	44
9	88
10	104
11	205
12	290
13	302
14	381
15	400
16	686
17	917
18	1150
19	2278
20	2757
21	3220
22	3316
23	7469
24	9535
25	21442
26	46409
27	103718
28	123688
29	147139

[2,3,4,5,9,27,35,44,88,104,205,290,302,381,400, 686,917,1150,2278,2757,3220,3316,7469,9535,21442, 46409,103718,123688,147139]