A156068 - OEIS

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A156068 as a simple table

n	a(n)
1	1
2	2
3	3
4	4
5	5
6	7
7	8
8	9
9	10
10	25
11	33
12	40
13	55
14	73
15	81
16	90
17	262
18	433
19	880
20	959
21	2272
22	3380
23	5459
24	7272

[1,2,3,4,5,7,8,9,10,25,33,40,55,73,81,90,262,433, 880,959,2272,3380,5459,7272]