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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.

A089823 Primes p such that the next prime after p can be obtained from p by adding the product of the digits of p.

Table of values

n a(n)
1 23
2 61
3 1123
4 1231
5 1321
6 2111
7 2131
8 11261
9 11621
10 12113
11 13121
12 15121
13 19121
14 21911
15 22511
16 27211
17 61211
18 116113
19 131231
20 312161
21 611113
22 1111211
23 1111213
24 1111361
25 1112611
26 1123151
27 1411411
28 1612111
29 2111411
30 2121131
31 3112111

List of values

[23, 61, 1123, 1231, 1321, 2111, 2131, 11261, 11621, 12113, 13121, 15121, 19121, 21911, 22511, 27211, 61211, 116113, 131231, 312161, 611113, 1111211, 1111213, 1111361, 1112611, 1123151, 1411411, 1612111, 2111411, 2121131, 3112111]

Started in 1964 by Neil J. A. Sloane | Maintained by The OEIS Foundation Inc.

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