A031949 - cp's OEIS frontend

A031949 Numbers with exactly two distinct base-4 digits.

n	a(n)
1	4
2	6
3	7
4	8
5	9
6	11
7	12
8	13
9	14
10	16
11	17
12	20
13	22
14	23
15	25
16	26
17	29
18	31
19	32
20	34
21	37
22	38
23	40
24	41
25	43
26	46
27	47
28	48
29	51
30	53
31	55
32	58
33	59
34	60
35	61
36	62
37	64
38	65
39	68
40	69
41	80
42	81
43	84
44	86
45	87
46	89
47	90
48	93
49	95
50	101
51	102
52	105
53	106
54	117
55	119
56	125
57	127
58	128
59	130

[4, 6, 7, 8, 9, 11, 12, 13, 14, 16, 17, 20, 22, 23, 25, 26, 29, 31, 32, 34, 37, 38, 40, 41, 43, 46, 47, 48, 51, 53, 55, 58, 59, 60, 61, 62, 64, 65, 68, 69, 80, 81, 84, 86, 87, 89, 90, 93, 95, 101, 102, 105, 106, 117, 119, 125, 127, 128, 130]

cp's OEIS Frontend

A031949 Numbers with exactly two distinct base-4 digits.

Table of values

List of values

n	a(n)
1	4
2	6
3	7
4	8
5	9
6	11
7	12
8	13
9	14
10	16
11	17
12	20
13	22
14	23
15	25
16	26
17	29
18	31
19	32
20	34
21	37
22	38
23	40
24	41
25	43
26	46
27	47
28	48
29	51
30	53
31	55
32	58
33	59
34	60
35	61
36	62
37	64
38	65
39	68
40	69
41	80
42	81
43	84
44	86
45	87
46	89
47	90
48	93
49	95
50	101
51	102
52	105
53	106
54	117
55	119
56	125
57	127
58	128
59	130

n	a(n)
1	4
2	6
3	7
4	8
5	9
6	11
7	12
8	13
9	14
10	16
11	17
12	20
13	22
14	23
15	25
16	26
17	29
18	31
19	32
20	34
21	37
22	38
23	40
24	41
25	43
26	46
27	47
28	48
29	51
30	53
31	55
32	58
33	59
34	60
35	61
36	62
37	64
38	65
39	68
40	69
41	80
42	81
43	84
44	86
45	87
46	89
47	90
48	93
49	95
50	101
51	102
52	105
53	106
54	117
55	119
56	125
57	127
58	128
59	130

n	a(n)
1	4
2	6
3	7
4	8
5	9
6	11
7	12
8	13
9	14
10	16
11	17
12	20
13	22
14	23
15	25
16	26
17	29
18	31
19	32
20	34
21	37
22	38
23	40
24	41
25	43
26	46
27	47
28	48
29	51
30	53
31	55
32	58
33	59
34	60
35	61
36	62
37	64
38	65
39	68
40	69
41	80
42	81
43	84
44	86
45	87
46	89
47	90
48	93
49	95
50	101
51	102
52	105
53	106
54	117
55	119
56	125
57	127
58	128
59	130