A229271 - cp's OEIS frontend

A229271 Numbers k for which k + k' and k - k' are both prime, k' being the arithmetic derivative of k.

n	a(n)
1	10
2	14
3	15
4	21
5	26
6	33
7	35
8	38
9	51
10	65
11	66
12	78
13	86
14	93
15	102
16	110
17	111
18	123
19	161
20	201
21	203
22	206
23	209
24	215
25	221
26	230
27	258
28	278
29	282
30	321
31	371
32	374
33	395
34	398
35	402
36	413
37	438
38	470
39	471
40	485
41	530
42	533
43	543
44	545
45	551
46	590
47	626
48	671
49	678
50	698
51	723
52	755
53	779
54	803
55	815

[10, 14, 15, 21, 26, 33, 35, 38, 51, 65, 66, 78, 86, 93, 102, 110, 111, 123, 161, 201, 203, 206, 209, 215, 221, 230, 258, 278, 282, 321, 371, 374, 395, 398, 402, 413, 438, 470, 471, 485, 530, 533, 543, 545, 551, 590, 626, 671, 678, 698, 723, 755, 779, 803, 815]

cp's OEIS Frontend

A229271 Numbers k for which k + k' and k - k' are both prime, k' being the arithmetic derivative of k.

Table of values

List of values

n	a(n)
1	10
2	14
3	15
4	21
5	26
6	33
7	35
8	38
9	51
10	65
11	66
12	78
13	86
14	93
15	102
16	110
17	111
18	123
19	161
20	201
21	203
22	206
23	209
24	215
25	221
26	230
27	258
28	278
29	282
30	321
31	371
32	374
33	395
34	398
35	402
36	413
37	438
38	470
39	471
40	485
41	530
42	533
43	543
44	545
45	551
46	590
47	626
48	671
49	678
50	698
51	723
52	755
53	779
54	803
55	815

n	a(n)
1	10
2	14
3	15
4	21
5	26
6	33
7	35
8	38
9	51
10	65
11	66
12	78
13	86
14	93
15	102
16	110
17	111
18	123
19	161
20	201
21	203
22	206
23	209
24	215
25	221
26	230
27	258
28	278
29	282
30	321
31	371
32	374
33	395
34	398
35	402
36	413
37	438
38	470
39	471
40	485
41	530
42	533
43	543
44	545
45	551
46	590
47	626
48	671
49	678
50	698
51	723
52	755
53	779
54	803
55	815

n	a(n)
1	10
2	14
3	15
4	21
5	26
6	33
7	35
8	38
9	51
10	65
11	66
12	78
13	86
14	93
15	102
16	110
17	111
18	123
19	161
20	201
21	203
22	206
23	209
24	215
25	221
26	230
27	258
28	278
29	282
30	321
31	371
32	374
33	395
34	398
35	402
36	413
37	438
38	470
39	471
40	485
41	530
42	533
43	543
44	545
45	551
46	590
47	626
48	671
49	678
50	698
51	723
52	755
53	779
54	803
55	815