A272284 - OEIS

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A272284 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	25
27	26
28	27
29	28
30	29
31	30
32	31
33	32
34	33
35	34
36	36
37	37
38	38
39	39
40	40
41	42
42	43
43	44
44	45
45	46
46	47
47	49
48	50
49	51
50	55
51	56
52	57
53	60
54	64
55	67
56	68
57	69
58	70
59	71
60	72
61	73
62	74
63	76
64	77
65	79
66	80
67	81

[0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18, 19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34, 36,37,38,39,40,42,43,44,45,46,47,49,50,51,55,56, 57,60,64,67,68,69,70,71,72,73,74,76,77,79,80,81]

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	25
27	26
28	27
29	28
30	29
31	30
32	31
33	32
34	33
35	34
36	36
37	37
38	38
39	39
40	40
41	42
42	43
43	44
44	45
45	46
46	47
47	49
48	50
49	51
50	55
51	56
52	57
53	60
54	64
55	67
56	68
57	69
58	70
59	71
60	72
61	73
62	74
63	76
64	77
65	79
66	80
67	81

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	25
27	26
28	27
29	28
30	29
31	30
32	31
33	32
34	33
35	34
36	36
37	37
38	38
39	39
40	40
41	42
42	43
43	44
44	45
45	46
46	47
47	49
48	50
49	51
50	55
51	56
52	57
53	60
54	64
55	67
56	68
57	69
58	70
59	71
60	72
61	73
62	74
63	76
64	77
65	79
66	80
67	81

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	25
27	26
28	27
29	28
30	29
31	30
32	31
33	32
34	33
35	34
36	36
37	37
38	38
39	39
40	40
41	42
42	43
43	44
44	45
45	46
46	47
47	49
48	50
49	51
50	55
51	56
52	57
53	60
54	64
55	67
56	68
57	69
58	70
59	71
60	72
61	73
62	74
63	76
64	77
65	79
66	80
67	81