A273728 - OEIS

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A273728 as a simple table

n	a(n)
1	1
2	2
3	3
4	5
5	7
6	12
7	37
8	45
9	55
10	139
11	205
12	264
13	445
14	975
15	1111
16	1298
17	1340
18	1835
19	2264
20	2317
21	2897
22	2955
23	3001
24	4134
25	6637
26	7063
27	20613
28	114795
29	147890

[1,2,3,5,7,12,37,45,55,139,205,264,445,975,1111, 1298,1340,1835,2264,2317,2897,2955,3001,4134,6637, 7063,20613,114795,147890]