A077797 - cp's OEIS frontend

A077797 Numbers k for which there exist k-digit palindromic wing primes (a.k.a. near-repdigit palindromic primes) of the general form r(10^k - 1)/9 + (m-r)10^floor(k/2) where k is the number of digits (an odd number > 1), r is the repeated digit, and m (different from r) is the middle digit.

n	a(n)
1	3
2	5
3	7
4	9
5	11
6	13
7	15
8	17
9	19
10	21
11	23
12	25
13	27
14	29
15	35
16	39
17	41
18	45
19	47
20	53
21	59
22	63
23	65
24	67
25	73
26	79
27	81
28	87
29	91
30	109
31	117
32	119
33	123
34	139
35	155
36	159
37	171
38	177
39	181
40	185
41	189
42	195
43	209
44	225
45	231
46	233
47	237
48	259
49	321
50	325
51	337
52	339
53	355
54	363
55	371
56	375
57	397
58	425
59	453

[3, 5, 7, 9, 11, 13, 15, 17, 19, 21, 23, 25, 27, 29, 35, 39, 41, 45, 47, 53, 59, 63, 65, 67, 73, 79, 81, 87, 91, 109, 117, 119, 123, 139, 155, 159, 171, 177, 181, 185, 189, 195, 209, 225, 231, 233, 237, 259, 321, 325, 337, 339, 355, 363, 371, 375, 397, 425, 453]

cp's OEIS Frontend

A077797 Numbers k for which there exist k-digit palindromic wing primes (a.k.a. near-repdigit palindromic primes) of the general form r(10^k - 1)/9 + (m-r)10^floor(k/2) where k is the number of digits (an odd number > 1), r is the repeated digit, and m (different from r) is the middle digit.

Table of values

List of values

n	a(n)
1	3
2	5
3	7
4	9
5	11
6	13
7	15
8	17
9	19
10	21
11	23
12	25
13	27
14	29
15	35
16	39
17	41
18	45
19	47
20	53
21	59
22	63
23	65
24	67
25	73
26	79
27	81
28	87
29	91
30	109
31	117
32	119
33	123
34	139
35	155
36	159
37	171
38	177
39	181
40	185
41	189
42	195
43	209
44	225
45	231
46	233
47	237
48	259
49	321
50	325
51	337
52	339
53	355
54	363
55	371
56	375
57	397
58	425
59	453

n	a(n)
1	3
2	5
3	7
4	9
5	11
6	13
7	15
8	17
9	19
10	21
11	23
12	25
13	27
14	29
15	35
16	39
17	41
18	45
19	47
20	53
21	59
22	63
23	65
24	67
25	73
26	79
27	81
28	87
29	91
30	109
31	117
32	119
33	123
34	139
35	155
36	159
37	171
38	177
39	181
40	185
41	189
42	195
43	209
44	225
45	231
46	233
47	237
48	259
49	321
50	325
51	337
52	339
53	355
54	363
55	371
56	375
57	397
58	425
59	453

cp's OEIS Frontend

A077797 Numbers k for which there exist k-digit palindromic wing primes (a.k.a. near-repdigit palindromic primes) of the general form r*(10^k - 1)/9 + (m-r)*10^floor(k/2) where k is the number of digits (an odd number > 1), r is the repeated digit, and m (different from r) is the middle digit.

Table of values

List of values

A077797 Numbers k for which there exist k-digit palindromic wing primes (a.k.a. near-repdigit palindromic primes) of the general form r(10^k - 1)/9 + (m-r)10^floor(k/2) where k is the number of digits (an odd number > 1), r is the repeated digit, and m (different from r) is the middle digit.

n	a(n)
1	3
2	5
3	7
4	9
5	11
6	13
7	15
8	17
9	19
10	21
11	23
12	25
13	27
14	29
15	35
16	39
17	41
18	45
19	47
20	53
21	59
22	63
23	65
24	67
25	73
26	79
27	81
28	87
29	91
30	109
31	117
32	119
33	123
34	139
35	155
36	159
37	171
38	177
39	181
40	185
41	189
42	195
43	209
44	225
45	231
46	233
47	237
48	259
49	321
50	325
51	337
52	339
53	355
54	363
55	371
56	375
57	397
58	425
59	453