cp's OEIS Frontend

This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

A268031 Primes with the property that deleting some two digits one at a time in unique order gives a prime (with an even number of digits) at each step, until the empty string is reached.

Table of values

n a(n)
1 11
2 13
3 17
4 19
5 23
6 29
7 31
8 37
9 41
10 43
11 47
12 53
13 59
14 61
15 67
16 71
17 73
18 79
19 83
20 89
21 97
22 1009
23 1021
24 1049
25 1051
26 1063
27 1069
28 1087
29 1201
30 1409
31 1609
32 1663
33 1669
34 1801
35 2003
36 2011
37 2017
38 2063
39 2069
40 2267
41 2609
42 2621
43 2657
44 2663
45 2687
46 2767
47 2861
48 3001
49 3023

List of values

[11, 13, 17, 19, 23, 29, 31, 37, 41, 43, 47, 53, 59, 61, 67, 71, 73, 79, 83, 89, 97, 1009, 1021, 1049, 1051, 1063, 1069, 1087, 1201, 1409, 1609, 1663, 1669, 1801, 2003, 2011, 2017, 2063, 2069, 2267, 2609, 2621, 2657, 2663, 2687, 2767, 2861, 3001, 3023]