A285829 - cp's OEIS frontend

A285829 Numbers n such that, for any i and j with i >= j >= 0, ds^i(n) divides ds^j(n) (where ds^k denotes the k-th iteration of the digital sum).

n	a(n)
1	1
2	2
3	3
4	4
5	5
6	6
7	7
8	8
9	9
10	10
11	12
12	18
13	20
14	21
15	24
16	27
17	30
18	36
19	40
20	42
21	45
22	48
23	50
24	54
25	60
26	63
27	70
28	72
29	80
30	81
31	84
32	90
33	100
34	102
35	108
36	110
37	111
38	112
39	114
40	117
41	120
42	126
43	132
44	133
45	135
46	140
47	144
48	150
49	152
50	153
51	156
52	162
53	171
54	180
55	190
56	192
57	198
58	200
59	201
60	204
61	207
62	210
63	216
64	220
65	222
66	224
67	225
68	228
69	230
70	234
71	240
72	243
73	252
74	261
75	264
76	270
77	280
78	288
79	300
80	306
81	312

[1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 12, 18, 20, 21, 24, 27, 30, 36, 40, 42, 45, 48, 50, 54, 60, 63, 70, 72, 80, 81, 84, 90, 100, 102, 108, 110, 111, 112, 114, 117, 120, 126, 132, 133, 135, 140, 144, 150, 152, 153, 156, 162, 171, 180, 190, 192, 198, 200, 201, 204, 207, 210, 216, 220, 222, 224, 225, 228, 230, 234, 240, 243, 252, 261, 264, 270, 280, 288, 300, 306, 312]

cp's OEIS Frontend

A285829 Numbers n such that, for any i and j with i >= j >= 0, ds^i(n) divides ds^j(n) (where ds^k denotes the k-th iteration of the digital sum).

Table of values

List of values

n	a(n)
1	1
2	2
3	3
4	4
5	5
6	6
7	7
8	8
9	9
10	10
11	12
12	18
13	20
14	21
15	24
16	27
17	30
18	36
19	40
20	42
21	45
22	48
23	50
24	54
25	60
26	63
27	70
28	72
29	80
30	81
31	84
32	90
33	100
34	102
35	108
36	110
37	111
38	112
39	114
40	117
41	120
42	126
43	132
44	133
45	135
46	140
47	144
48	150
49	152
50	153
51	156
52	162
53	171
54	180
55	190
56	192
57	198
58	200
59	201
60	204
61	207
62	210
63	216
64	220
65	222
66	224
67	225
68	228
69	230
70	234
71	240
72	243
73	252
74	261
75	264
76	270
77	280
78	288
79	300
80	306
81	312

n	a(n)
1	1
2	2
3	3
4	4
5	5
6	6
7	7
8	8
9	9
10	10
11	12
12	18
13	20
14	21
15	24
16	27
17	30
18	36
19	40
20	42
21	45
22	48
23	50
24	54
25	60
26	63
27	70
28	72
29	80
30	81
31	84
32	90
33	100
34	102
35	108
36	110
37	111
38	112
39	114
40	117
41	120
42	126
43	132
44	133
45	135
46	140
47	144
48	150
49	152
50	153
51	156
52	162
53	171
54	180
55	190
56	192
57	198
58	200
59	201
60	204
61	207
62	210
63	216
64	220
65	222
66	224
67	225
68	228
69	230
70	234
71	240
72	243
73	252
74	261
75	264
76	270
77	280
78	288
79	300
80	306
81	312

n	a(n)
1	1
2	2
3	3
4	4
5	5
6	6
7	7
8	8
9	9
10	10
11	12
12	18
13	20
14	21
15	24
16	27
17	30
18	36
19	40
20	42
21	45
22	48
23	50
24	54
25	60
26	63
27	70
28	72
29	80
30	81
31	84
32	90
33	100
34	102
35	108
36	110
37	111
38	112
39	114
40	117
41	120
42	126
43	132
44	133
45	135
46	140
47	144
48	150
49	152
50	153
51	156
52	162
53	171
54	180
55	190
56	192
57	198
58	200
59	201
60	204
61	207
62	210
63	216
64	220
65	222
66	224
67	225
68	228
69	230
70	234
71	240
72	243
73	252
74	261
75	264
76	270
77	280
78	288
79	300
80	306
81	312