A368903 - cp's OEIS frontend

A368903 Numbers k for which there is no prime p such that p^p divides A342001(k), but for A003415(k) such a prime exists. Here A003415(n) is the arithmetic derivative of n, and A342001(n) = A003415(n) / A003557(n).

n	a(n)
1	4
2	8
3	24
4	27
5	32
6	36
7	40
8	48
9	54
10	56
11	60
12	64
13	72
14	80
15	84
16	88
17	96
18	100
19	104
20	112
21	120
22	128
23	132
24	135
25	136
26	140
27	152
28	156
29	162
30	168
31	176
32	184
33	196
34	200
35	204
36	216
37	220
38	224
39	228
40	232
41	243
42	248
43	260
44	264
45	270
46	272
47	276
48	280
49	288
50	296
51	304
52	308
53	312
54	324
55	328
56	340
57	344
58	348
59	351
60	352
61	360
62	364
63	368
64	372
65	376
66	378
67	380

[4, 8, 24, 27, 32, 36, 40, 48, 54, 56, 60, 64, 72, 80, 84, 88, 96, 100, 104, 112, 120, 128, 132, 135, 136, 140, 152, 156, 162, 168, 176, 184, 196, 200, 204, 216, 220, 224, 228, 232, 243, 248, 260, 264, 270, 272, 276, 280, 288, 296, 304, 308, 312, 324, 328, 340, 344, 348, 351, 352, 360, 364, 368, 372, 376, 378, 380]

cp's OEIS Frontend

A368903 Numbers k for which there is no prime p such that p^p divides A342001(k), but for A003415(k) such a prime exists. Here A003415(n) is the arithmetic derivative of n, and A342001(n) = A003415(n) / A003557(n).

Table of values

List of values

n	a(n)
1	4
2	8
3	24
4	27
5	32
6	36
7	40
8	48
9	54
10	56
11	60
12	64
13	72
14	80
15	84
16	88
17	96
18	100
19	104
20	112
21	120
22	128
23	132
24	135
25	136
26	140
27	152
28	156
29	162
30	168
31	176
32	184
33	196
34	200
35	204
36	216
37	220
38	224
39	228
40	232
41	243
42	248
43	260
44	264
45	270
46	272
47	276
48	280
49	288
50	296
51	304
52	308
53	312
54	324
55	328
56	340
57	344
58	348
59	351
60	352
61	360
62	364
63	368
64	372
65	376
66	378
67	380

n	a(n)
1	4
2	8
3	24
4	27
5	32
6	36
7	40
8	48
9	54
10	56
11	60
12	64
13	72
14	80
15	84
16	88
17	96
18	100
19	104
20	112
21	120
22	128
23	132
24	135
25	136
26	140
27	152
28	156
29	162
30	168
31	176
32	184
33	196
34	200
35	204
36	216
37	220
38	224
39	228
40	232
41	243
42	248
43	260
44	264
45	270
46	272
47	276
48	280
49	288
50	296
51	304
52	308
53	312
54	324
55	328
56	340
57	344
58	348
59	351
60	352
61	360
62	364
63	368
64	372
65	376
66	378
67	380

n	a(n)
1	4
2	8
3	24
4	27
5	32
6	36
7	40
8	48
9	54
10	56
11	60
12	64
13	72
14	80
15	84
16	88
17	96
18	100
19	104
20	112
21	120
22	128
23	132
24	135
25	136
26	140
27	152
28	156
29	162
30	168
31	176
32	184
33	196
34	200
35	204
36	216
37	220
38	224
39	228
40	232
41	243
42	248
43	260
44	264
45	270
46	272
47	276
48	280
49	288
50	296
51	304
52	308
53	312
54	324
55	328
56	340
57	344
58	348
59	351
60	352
61	360
62	364
63	368
64	372
65	376
66	378
67	380