A355301 - cp's OEIS frontend

A355301 Normal undulating numbers where "undulating" means that the alternate digits go up and down (or down and up) and "normal" means that the absolute differences between two adjacent digits may differ.

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	12
13	13
14	14
15	15
16	16
17	17
18	18
19	19
20	20
21	21
22	23
23	24
24	25
25	26
26	27
27	28
28	29
29	30
30	31
31	32
32	34
33	35
34	36
35	37
36	38
37	39
38	40
39	41
40	42
41	43
42	45
43	46
44	47
45	48
46	49
47	50
48	51
49	52
50	53
51	54
52	56
53	57
54	58
55	59
56	60
57	61
58	62
59	63
60	64
61	65
62	67
63	68
64	69
65	70
66	71
67	72
68	73
69	74
70	75
71	76
72	78
73	79
74	80
75	81
76	82
77	83
78	84
79	85
80	86
81	87
82	89
83	90
84	91
85	92
86	93
87	94
88	95
89	96
90	97
91	98
92	101
93	102
94	103
95	104
96	105
97	106
98	107
99	108
100	109
101	120
102	121
103	130
104	131
105	132
106	140
107	141
108	142
109	143
110	150

[0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 34, 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, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 78, 79, 80, 81, 82, 83, 84, 85, 86, 87, 89, 90, 91, 92, 93, 94, 95, 96, 97, 98, 101, 102, 103, 104, 105, 106, 107, 108, 109, 120, 121, 130, 131, 132, 140, 141, 142, 143, 150]

cp's OEIS Frontend

A355301 Normal undulating numbers where "undulating" means that the alternate digits go up and down (or down and up) and "normal" means that the absolute differences between two adjacent digits may differ.

Table of values

List of values

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	12
13	13
14	14
15	15
16	16
17	17
18	18
19	19
20	20
21	21
22	23
23	24
24	25
25	26
26	27
27	28
28	29
29	30
30	31
31	32
32	34
33	35
34	36
35	37
36	38
37	39
38	40
39	41
40	42
41	43
42	45
43	46
44	47
45	48
46	49
47	50
48	51
49	52
50	53
51	54
52	56
53	57
54	58
55	59
56	60
57	61
58	62
59	63
60	64
61	65
62	67
63	68
64	69
65	70
66	71
67	72
68	73
69	74
70	75
71	76
72	78
73	79
74	80
75	81
76	82
77	83
78	84
79	85
80	86
81	87
82	89
83	90
84	91
85	92
86	93
87	94
88	95
89	96
90	97
91	98
92	101
93	102
94	103
95	104
96	105
97	106
98	107
99	108
100	109
101	120
102	121
103	130
104	131
105	132
106	140
107	141
108	142
109	143
110	150

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	12
13	13
14	14
15	15
16	16
17	17
18	18
19	19
20	20
21	21
22	23
23	24
24	25
25	26
26	27
27	28
28	29
29	30
30	31
31	32
32	34
33	35
34	36
35	37
36	38
37	39
38	40
39	41
40	42
41	43
42	45
43	46
44	47
45	48
46	49
47	50
48	51
49	52
50	53
51	54
52	56
53	57
54	58
55	59
56	60
57	61
58	62
59	63
60	64
61	65
62	67
63	68
64	69
65	70
66	71
67	72
68	73
69	74
70	75
71	76
72	78
73	79
74	80
75	81
76	82
77	83
78	84
79	85
80	86
81	87
82	89
83	90
84	91
85	92
86	93
87	94
88	95
89	96
90	97
91	98
92	101
93	102
94	103
95	104
96	105
97	106
98	107
99	108
100	109
101	120
102	121
103	130
104	131
105	132
106	140
107	141
108	142
109	143
110	150

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	12
13	13
14	14
15	15
16	16
17	17
18	18
19	19
20	20
21	21
22	23
23	24
24	25
25	26
26	27
27	28
28	29
29	30
30	31
31	32
32	34
33	35
34	36
35	37
36	38
37	39
38	40
39	41
40	42
41	43
42	45
43	46
44	47
45	48
46	49
47	50
48	51
49	52
50	53
51	54
52	56
53	57
54	58
55	59
56	60
57	61
58	62
59	63
60	64
61	65
62	67
63	68
64	69
65	70
66	71
67	72
68	73
69	74
70	75
71	76
72	78
73	79
74	80
75	81
76	82
77	83
78	84
79	85
80	86
81	87
82	89
83	90
84	91
85	92
86	93
87	94
88	95
89	96
90	97
91	98
92	101
93	102
94	103
95	104
96	105
97	106
98	107
99	108
100	109
101	120
102	121
103	130
104	131
105	132
106	140
107	141
108	142
109	143
110	150