A383781 - cp's OEIS frontend

A383781 Primes where successively deleting the most 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	19
7	29
8	31
9	41
10	59
11	61
12	71
13	79
14	89
15	127
16	157
17	163
18	193
19	227
20	233
21	257
22	263
23	277
24	293
25	433
26	457
27	463
28	487
29	557
30	563
31	577
32	587
33	593
34	677
35	727
36	733
37	757
38	787
39	827
40	857
41	863
42	877
43	887
44	977
45	1129
46	1171
47	1231
48	1259
49	1279
50	1289
51	1319
52	1361
53	1429
54	1459

[2, 3, 5, 7, 11, 19, 29, 31, 41, 59, 61, 71, 79, 89, 127, 157, 163, 193, 227, 233, 257, 263, 277, 293, 433, 457, 463, 487, 557, 563, 577, 587, 593, 677, 727, 733, 757, 787, 827, 857, 863, 877, 887, 977, 1129, 1171, 1231, 1259, 1279, 1289, 1319, 1361, 1429, 1459]

cp's OEIS Frontend

A383781 Primes where successively deleting the most 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