A369639 - cp's OEIS frontend

A369639 Numbers k, not squarefree, such that the maximal digit in the primorial base representation of k' is <= 3, where k' stands for the arithmetic derivative of k, A003415.

n	a(n)
1	4
2	8
3	9
4	12
5	16
6	18
7	24
8	25
9	28
10	32
11	36
12	40
13	44
14	45
15	48
16	49
17	50
18	54
19	56
20	60
21	63
22	68
23	76
24	81
25	92
26	96
27	98
28	99
29	108
30	112
31	120
32	121
33	125
34	136
35	147
36	153
37	156
38	160
39	175
40	184
41	189
42	192
43	196
44	198
45	204
46	208
47	212
48	220
49	225
50	228
51	234
52	236
53	244
54	250
55	252
56	268
57	270
58	280
59	284
60	289
61	296
62	300
63	315
64	316
65	328
66	333
67	338
68	340
69	344
70	361

[4, 8, 9, 12, 16, 18, 24, 25, 28, 32, 36, 40, 44, 45, 48, 49, 50, 54, 56, 60, 63, 68, 76, 81, 92, 96, 98, 99, 108, 112, 120, 121, 125, 136, 147, 153, 156, 160, 175, 184, 189, 192, 196, 198, 204, 208, 212, 220, 225, 228, 234, 236, 244, 250, 252, 268, 270, 280, 284, 289, 296, 300, 315, 316, 328, 333, 338, 340, 344, 361]

cp's OEIS Frontend

A369639 Numbers k, not squarefree, such that the maximal digit in the primorial base representation of k' is <= 3, where k' stands for the arithmetic derivative of k, A003415.

Table of values

List of values

n	a(n)
1	4
2	8
3	9
4	12
5	16
6	18
7	24
8	25
9	28
10	32
11	36
12	40
13	44
14	45
15	48
16	49
17	50
18	54
19	56
20	60
21	63
22	68
23	76
24	81
25	92
26	96
27	98
28	99
29	108
30	112
31	120
32	121
33	125
34	136
35	147
36	153
37	156
38	160
39	175
40	184
41	189
42	192
43	196
44	198
45	204
46	208
47	212
48	220
49	225
50	228
51	234
52	236
53	244
54	250
55	252
56	268
57	270
58	280
59	284
60	289
61	296
62	300
63	315
64	316
65	328
66	333
67	338
68	340
69	344
70	361

n	a(n)
1	4
2	8
3	9
4	12
5	16
6	18
7	24
8	25
9	28
10	32
11	36
12	40
13	44
14	45
15	48
16	49
17	50
18	54
19	56
20	60
21	63
22	68
23	76
24	81
25	92
26	96
27	98
28	99
29	108
30	112
31	120
32	121
33	125
34	136
35	147
36	153
37	156
38	160
39	175
40	184
41	189
42	192
43	196
44	198
45	204
46	208
47	212
48	220
49	225
50	228
51	234
52	236
53	244
54	250
55	252
56	268
57	270
58	280
59	284
60	289
61	296
62	300
63	315
64	316
65	328
66	333
67	338
68	340
69	344
70	361

n	a(n)
1	4
2	8
3	9
4	12
5	16
6	18
7	24
8	25
9	28
10	32
11	36
12	40
13	44
14	45
15	48
16	49
17	50
18	54
19	56
20	60
21	63
22	68
23	76
24	81
25	92
26	96
27	98
28	99
29	108
30	112
31	120
32	121
33	125
34	136
35	147
36	153
37	156
38	160
39	175
40	184
41	189
42	192
43	196
44	198
45	204
46	208
47	212
48	220
49	225
50	228
51	234
52	236
53	244
54	250
55	252
56	268
57	270
58	280
59	284
60	289
61	296
62	300
63	315
64	316
65	328
66	333
67	338
68	340
69	344
70	361