A373259 - cp's OEIS frontend

A373259 Numbers k such that k' / gcd(k,k') is a multiple of 4 and A276085(k) is a multiple of 8, where k' stands for the arithmetic derivative of k, A003415, and A276085 is the primorial base log-function.

n	a(n)
1	1
2	15
3	28
4	39
5	51
6	55
7	76
8	81
9	87
10	115
11	124
12	143
13	144
14	183
15	187
16	188
17	215
18	219
19	225
20	256
21	259
22	267
23	268
24	287
25	291
26	295
27	297
28	299
29	303
30	316
31	319
32	327
33	339
34	355
35	371
36	391
37	400
38	411
39	412
40	415
41	420
42	441
43	471
44	508
45	519
46	528
47	535
48	556
49	559
50	579
51	585
52	591
53	621
54	625
55	652
56	655
57	667
58	671
59	687
60	699
61	703
62	716
63	731
64	755
65	765
66	767

[1, 15, 28, 39, 51, 55, 76, 81, 87, 115, 124, 143, 144, 183, 187, 188, 215, 219, 225, 256, 259, 267, 268, 287, 291, 295, 297, 299, 303, 316, 319, 327, 339, 355, 371, 391, 400, 411, 412, 415, 420, 441, 471, 508, 519, 528, 535, 556, 559, 579, 585, 591, 621, 625, 652, 655, 667, 671, 687, 699, 703, 716, 731, 755, 765, 767]

cp's OEIS Frontend

A373259 Numbers k such that k' / gcd(k,k') is a multiple of 4 and A276085(k) is a multiple of 8, where k' stands for the arithmetic derivative of k, A003415, and A276085 is the primorial base log-function.

Table of values

List of values

n	a(n)
1	1
2	15
3	28
4	39
5	51
6	55
7	76
8	81
9	87
10	115
11	124
12	143
13	144
14	183
15	187
16	188
17	215
18	219
19	225
20	256
21	259
22	267
23	268
24	287
25	291
26	295
27	297
28	299
29	303
30	316
31	319
32	327
33	339
34	355
35	371
36	391
37	400
38	411
39	412
40	415
41	420
42	441
43	471
44	508
45	519
46	528
47	535
48	556
49	559
50	579
51	585
52	591
53	621
54	625
55	652
56	655
57	667
58	671
59	687
60	699
61	703
62	716
63	731
64	755
65	765
66	767

n	a(n)
1	1
2	15
3	28
4	39
5	51
6	55
7	76
8	81
9	87
10	115
11	124
12	143
13	144
14	183
15	187
16	188
17	215
18	219
19	225
20	256
21	259
22	267
23	268
24	287
25	291
26	295
27	297
28	299
29	303
30	316
31	319
32	327
33	339
34	355
35	371
36	391
37	400
38	411
39	412
40	415
41	420
42	441
43	471
44	508
45	519
46	528
47	535
48	556
49	559
50	579
51	585
52	591
53	621
54	625
55	652
56	655
57	667
58	671
59	687
60	699
61	703
62	716
63	731
64	755
65	765
66	767

n	a(n)
1	1
2	15
3	28
4	39
5	51
6	55
7	76
8	81
9	87
10	115
11	124
12	143
13	144
14	183
15	187
16	188
17	215
18	219
19	225
20	256
21	259
22	267
23	268
24	287
25	291
26	295
27	297
28	299
29	303
30	316
31	319
32	327
33	339
34	355
35	371
36	391
37	400
38	411
39	412
40	415
41	420
42	441
43	471
44	508
45	519
46	528
47	535
48	556
49	559
50	579
51	585
52	591
53	621
54	625
55	652
56	655
57	667
58	671
59	687
60	699
61	703
62	716
63	731
64	755
65	765
66	767