A383779 - cp's OEIS frontend

A383779 Primes where successively deleting the least significant digit yields a sequence that alternates between a prime and a nonprime at every step until a single-digit number remains.

n	a(n)
1	2
2	3
3	5
4	7
5	11
6	13
7	17
8	19
9	41
10	43
11	47
12	61
13	67
14	83
15	89
16	97
17	211
18	223
19	227
20	229
21	241
22	251
23	257
24	263
25	269
26	271
27	277
28	281
29	283
30	307
31	331
32	337
33	347
34	349
35	353
36	359
37	367
38	383
39	389
40	397
41	503
42	509
43	521
44	523
45	541
46	547
47	557
48	563
49	569
50	571
51	577
52	587
53	701
54	709
55	727
56	743
57	751
58	757
59	761
60	769
61	773
62	787

[2, 3, 5, 7, 11, 13, 17, 19, 41, 43, 47, 61, 67, 83, 89, 97, 211, 223, 227, 229, 241, 251, 257, 263, 269, 271, 277, 281, 283, 307, 331, 337, 347, 349, 353, 359, 367, 383, 389, 397, 503, 509, 521, 523, 541, 547, 557, 563, 569, 571, 577, 587, 701, 709, 727, 743, 751, 757, 761, 769, 773, 787]

cp's OEIS Frontend

A383779 Primes where successively deleting the least significant digit yields a sequence that alternates between a prime and a nonprime at every step until a single-digit number remains.

Table of values

List of values

n	a(n)
1	2
2	3
3	5
4	7
5	11
6	13
7	17
8	19
9	41
10	43
11	47
12	61
13	67
14	83
15	89
16	97
17	211
18	223
19	227
20	229
21	241
22	251
23	257
24	263
25	269
26	271
27	277
28	281
29	283
30	307
31	331
32	337
33	347
34	349
35	353
36	359
37	367
38	383
39	389
40	397
41	503
42	509
43	521
44	523
45	541
46	547
47	557
48	563
49	569
50	571
51	577
52	587
53	701
54	709
55	727
56	743
57	751
58	757
59	761
60	769
61	773
62	787

n	a(n)
1	2
2	3
3	5
4	7
5	11
6	13
7	17
8	19
9	41
10	43
11	47
12	61
13	67
14	83
15	89
16	97
17	211
18	223
19	227
20	229
21	241
22	251
23	257
24	263
25	269
26	271
27	277
28	281
29	283
30	307
31	331
32	337
33	347
34	349
35	353
36	359
37	367
38	383
39	389
40	397
41	503
42	509
43	521
44	523
45	541
46	547
47	557
48	563
49	569
50	571
51	577
52	587
53	701
54	709
55	727
56	743
57	751
58	757
59	761
60	769
61	773
62	787

n	a(n)
1	2
2	3
3	5
4	7
5	11
6	13
7	17
8	19
9	41
10	43
11	47
12	61
13	67
14	83
15	89
16	97
17	211
18	223
19	227
20	229
21	241
22	251
23	257
24	263
25	269
26	271
27	277
28	281
29	283
30	307
31	331
32	337
33	347
34	349
35	353
36	359
37	367
38	383
39	389
40	397
41	503
42	509
43	521
44	523
45	541
46	547
47	557
48	563
49	569
50	571
51	577
52	587
53	701
54	709
55	727
56	743
57	751
58	757
59	761
60	769
61	773
62	787