A175427 - OEIS

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A175427 as a simple table

n	a(n)
1	0
2	1
3	2
4	3
5	4
6	5
7	6
8	7
9	8
10	9
11	10
12	11
13	12
14	13
15	14
16	15
17	16
18	17
19	18
20	19
21	20
22	21
23	22
24	23
25	24
26	27
27	28
28	29
29	30
30	31
31	32
32	33
33	34
34	37
35	38
36	39
37	40
38	41
39	42
40	43
41	44
42	45
43	46
44	47
45	48
46	49
47	50

[0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18, 19,20,21,22,23,24,27,28,29,30,31,32,33,34,37,38, 39,40,41,42,43,44,45,46,47,48,49,50]