A139446 - OEIS

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A139446 as a simple table

n	a(n)
1	4
2	5
3	6
4	8
5	10
6	12
7	23
8	38
9	50
10	65
11	67
12	95
13	100
14	108
15	114
16	281
17	835
18	894
19	1103
20	3442
21	6629

[4,5,6,8,10,12,23,38,50,65,67,95,100,108,114,281, 835,894,1103,3442,6629]