A303847 - cp's OEIS frontend

A303847 Lexicographically earliest sequence of distinct terms such that what emerges from the mask (right-aligned) is prime (see the Comments section for the mask explanation).

n	a(n)
1	1
2	20
3	2
4	21
5	3
6	22
7	4
8	23
9	5
10	24
11	6
12	25
13	7
14	26
15	8
16	27
17	9
18	28
19	200
20	10
21	201
22	11
23	202
24	12
25	203
26	13
27	204
28	14
29	205
30	15
31	206
32	16
33	207
34	17
35	208
36	18
37	209
38	19
39	210
40	29
41	211
42	30
43	212
44	31
45	213
46	32
47	214
48	33
49	215
50	34
51	216
52	35
53	217
54	36
55	218
56	37
57	219
58	38
59	220
60	39
61	221
62	40
63	222
64	41
65	223
66	42
67	224
68	43
69	225
70	44
71	226
72	45
73	227
74	46
75	228
76	47

[1, 20, 2, 21, 3, 22, 4, 23, 5, 24, 6, 25, 7, 26, 8, 27, 9, 28, 200, 10, 201, 11, 202, 12, 203, 13, 204, 14, 205, 15, 206, 16, 207, 17, 208, 18, 209, 19, 210, 29, 211, 30, 212, 31, 213, 32, 214, 33, 215, 34, 216, 35, 217, 36, 218, 37, 219, 38, 220, 39, 221, 40, 222, 41, 223, 42, 224, 43, 225, 44, 226, 45, 227, 46, 228, 47]

cp's OEIS Frontend

A303847 Lexicographically earliest sequence of distinct terms such that what emerges from the mask (right-aligned) is prime (see the Comments section for the mask explanation).

Table of values

List of values

n	a(n)
1	1
2	20
3	2
4	21
5	3
6	22
7	4
8	23
9	5
10	24
11	6
12	25
13	7
14	26
15	8
16	27
17	9
18	28
19	200
20	10
21	201
22	11
23	202
24	12
25	203
26	13
27	204
28	14
29	205
30	15
31	206
32	16
33	207
34	17
35	208
36	18
37	209
38	19
39	210
40	29
41	211
42	30
43	212
44	31
45	213
46	32
47	214
48	33
49	215
50	34
51	216
52	35
53	217
54	36
55	218
56	37
57	219
58	38
59	220
60	39
61	221
62	40
63	222
64	41
65	223
66	42
67	224
68	43
69	225
70	44
71	226
72	45
73	227
74	46
75	228
76	47

n	a(n)
1	1
2	20
3	2
4	21
5	3
6	22
7	4
8	23
9	5
10	24
11	6
12	25
13	7
14	26
15	8
16	27
17	9
18	28
19	200
20	10
21	201
22	11
23	202
24	12
25	203
26	13
27	204
28	14
29	205
30	15
31	206
32	16
33	207
34	17
35	208
36	18
37	209
38	19
39	210
40	29
41	211
42	30
43	212
44	31
45	213
46	32
47	214
48	33
49	215
50	34
51	216
52	35
53	217
54	36
55	218
56	37
57	219
58	38
59	220
60	39
61	221
62	40
63	222
64	41
65	223
66	42
67	224
68	43
69	225
70	44
71	226
72	45
73	227
74	46
75	228
76	47

n	a(n)
1	1
2	20
3	2
4	21
5	3
6	22
7	4
8	23
9	5
10	24
11	6
12	25
13	7
14	26
15	8
16	27
17	9
18	28
19	200
20	10
21	201
22	11
23	202
24	12
25	203
26	13
27	204
28	14
29	205
30	15
31	206
32	16
33	207
34	17
35	208
36	18
37	209
38	19
39	210
40	29
41	211
42	30
43	212
44	31
45	213
46	32
47	214
48	33
49	215
50	34
51	216
52	35
53	217
54	36
55	218
56	37
57	219
58	38
59	220
60	39
61	221
62	40
63	222
64	41
65	223
66	42
67	224
68	43
69	225
70	44
71	226
72	45
73	227
74	46
75	228
76	47