A081688 - OEIS

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A081688 as a simple table

n	a(n)
0	0
1	1
2	3
3	4
4	5
5	7
6	8
7	9
8	10
9	12
10	13
11	14
12	15
13	16
14	18
15	19
16	20
17	21
18	22
19	23
20	24
21	26
22	27
23	28
24	29
25	30
26	31
27	32
28	33
29	35
30	36
31	37
32	38
33	39
34	40
35	41
36	42
37	43
38	45
39	46
40	47
41	48
42	49
43	50
44	51
45	52
46	53
47	54
48	56
49	57
50	58
51	59
52	60
53	61
54	62
55	63
56	64
57	65
58	66
59	67
60	69
61	70
62	71
63	72
64	73
65	74
66	75
67	76
68	77

[0,1,3,4,5,7,8,9,10,12,13,14,15,16,18,19,20,21,22, 23,24,26,27,28,29,30,31,32,33,35,36,37,38,39,40, 41,42,43,45,46,47,48,49,50,51,52,53,54,56,57,58, 59,60,61,62,63,64,65,66,67,69,70,71,72,73,74,75, 76,77]

n	a(n)
0	0
1	1
2	3
3	4
4	5
5	7
6	8
7	9
8	10
9	12
10	13
11	14
12	15
13	16
14	18
15	19
16	20
17	21
18	22
19	23
20	24
21	26
22	27
23	28
24	29
25	30
26	31
27	32
28	33
29	35
30	36
31	37
32	38
33	39
34	40
35	41
36	42
37	43
38	45
39	46
40	47
41	48
42	49
43	50
44	51
45	52
46	53
47	54
48	56
49	57
50	58
51	59
52	60
53	61
54	62
55	63
56	64
57	65
58	66
59	67
60	69
61	70
62	71
63	72
64	73
65	74
66	75
67	76
68	77

n	a(n)
0	0
1	1
2	3
3	4
4	5
5	7
6	8
7	9
8	10
9	12
10	13
11	14
12	15
13	16
14	18
15	19
16	20
17	21
18	22
19	23
20	24
21	26
22	27
23	28
24	29
25	30
26	31
27	32
28	33
29	35
30	36
31	37
32	38
33	39
34	40
35	41
36	42
37	43
38	45
39	46
40	47
41	48
42	49
43	50
44	51
45	52
46	53
47	54
48	56
49	57
50	58
51	59
52	60
53	61
54	62
55	63
56	64
57	65
58	66
59	67
60	69
61	70
62	71
63	72
64	73
65	74
66	75
67	76
68	77

n	a(n)
0	0
1	1
2	3
3	4
4	5
5	7
6	8
7	9
8	10
9	12
10	13
11	14
12	15
13	16
14	18
15	19
16	20
17	21
18	22
19	23
20	24
21	26
22	27
23	28
24	29
25	30
26	31
27	32
28	33
29	35
30	36
31	37
32	38
33	39
34	40
35	41
36	42
37	43
38	45
39	46
40	47
41	48
42	49
43	50
44	51
45	52
46	53
47	54
48	56
49	57
50	58
51	59
52	60
53	61
54	62
55	63
56	64
57	65
58	66
59	67
60	69
61	70
62	71
63	72
64	73
65	74
66	75
67	76
68	77