A069866 - cp's OEIS frontend

A069866 Primes in which repeatedly deleting the most significant digit then the least significant digit gives a prime at every step until a single-digit prime remains.

n	a(n)
1	2
2	3
3	5
4	7
5	13
6	17
7	23
8	37
9	43
10	47
11	53
12	67
13	73
14	83
15	97
16	131
17	137
18	173
19	179
20	223
21	229
22	271
23	331
24	337
25	353
26	359
27	373
28	379
29	431
30	479
31	523
32	571
33	631
34	653
35	659
36	673
37	773
38	823
39	829
40	853
41	859
42	929
43	937
44	953
45	971
46	1031
47	1373
48	1433
49	1439
50	1733
51	2029
52	2053
53	2131
54	2137

[2, 3, 5, 7, 13, 17, 23, 37, 43, 47, 53, 67, 73, 83, 97, 131, 137, 173, 179, 223, 229, 271, 331, 337, 353, 359, 373, 379, 431, 479, 523, 571, 631, 653, 659, 673, 773, 823, 829, 853, 859, 929, 937, 953, 971, 1031, 1373, 1433, 1439, 1733, 2029, 2053, 2131, 2137]

cp's OEIS Frontend

A069866 Primes in which repeatedly deleting the most significant digit then the least significant digit gives a prime at every step until a single-digit prime remains.

Table of values

List of values