A380537 - cp's OEIS frontend

A380537 Numbers k such that k is a multiple of A351566(k), where A351566 is the radix prime of the second least significant nonzero digit in the primorial base expansion of n, or 1 if there is no such digit.

n	a(n)
1	1
2	2
3	3
4	4
5	6
6	9
7	10
8	12
9	15
10	18
11	20
12	21
13	24
14	25
15	27
16	30
17	33
18	39
19	40
20	42
21	45
22	50
23	51
24	55
25	57
26	60
27	63
28	69
29	70
30	75
31	80
32	81
33	84
34	85
35	87
36	90
37	91
38	93
39	99
40	100
41	105
42	110
43	111
44	115
45	117
46	120
47	123
48	126
49	129
50	130
51	135
52	140
53	141
54	145
55	147
56	150
57	153
58	154
59	159
60	160
61	165
62	168
63	170
64	171
65	175
66	177
67	180
68	182
69	183
70	189
71	190
72	195
73	200

[1, 2, 3, 4, 6, 9, 10, 12, 15, 18, 20, 21, 24, 25, 27, 30, 33, 39, 40, 42, 45, 50, 51, 55, 57, 60, 63, 69, 70, 75, 80, 81, 84, 85, 87, 90, 91, 93, 99, 100, 105, 110, 111, 115, 117, 120, 123, 126, 129, 130, 135, 140, 141, 145, 147, 150, 153, 154, 159, 160, 165, 168, 170, 171, 175, 177, 180, 182, 183, 189, 190, 195, 200]

cp's OEIS Frontend

A380537 Numbers k such that k is a multiple of A351566(k), where A351566 is the radix prime of the second least significant nonzero digit in the primorial base expansion of n, or 1 if there is no such digit.

Table of values

List of values

n	a(n)
1	1
2	2
3	3
4	4
5	6
6	9
7	10
8	12
9	15
10	18
11	20
12	21
13	24
14	25
15	27
16	30
17	33
18	39
19	40
20	42
21	45
22	50
23	51
24	55
25	57
26	60
27	63
28	69
29	70
30	75
31	80
32	81
33	84
34	85
35	87
36	90
37	91
38	93
39	99
40	100
41	105
42	110
43	111
44	115
45	117
46	120
47	123
48	126
49	129
50	130
51	135
52	140
53	141
54	145
55	147
56	150
57	153
58	154
59	159
60	160
61	165
62	168
63	170
64	171
65	175
66	177
67	180
68	182
69	183
70	189
71	190
72	195
73	200

n	a(n)
1	1
2	2
3	3
4	4
5	6
6	9
7	10
8	12
9	15
10	18
11	20
12	21
13	24
14	25
15	27
16	30
17	33
18	39
19	40
20	42
21	45
22	50
23	51
24	55
25	57
26	60
27	63
28	69
29	70
30	75
31	80
32	81
33	84
34	85
35	87
36	90
37	91
38	93
39	99
40	100
41	105
42	110
43	111
44	115
45	117
46	120
47	123
48	126
49	129
50	130
51	135
52	140
53	141
54	145
55	147
56	150
57	153
58	154
59	159
60	160
61	165
62	168
63	170
64	171
65	175
66	177
67	180
68	182
69	183
70	189
71	190
72	195
73	200

n	a(n)
1	1
2	2
3	3
4	4
5	6
6	9
7	10
8	12
9	15
10	18
11	20
12	21
13	24
14	25
15	27
16	30
17	33
18	39
19	40
20	42
21	45
22	50
23	51
24	55
25	57
26	60
27	63
28	69
29	70
30	75
31	80
32	81
33	84
34	85
35	87
36	90
37	91
38	93
39	99
40	100
41	105
42	110
43	111
44	115
45	117
46	120
47	123
48	126
49	129
50	130
51	135
52	140
53	141
54	145
55	147
56	150
57	153
58	154
59	159
60	160
61	165
62	168
63	170
64	171
65	175
66	177
67	180
68	182
69	183
70	189
71	190
72	195
73	200