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.

A217309 Minimal natural number (in decimal representation) with n prime substrings in base-9 representation (substrings with leading zeros are considered to be nonprime).

Table of values

n a(n)
0 1
1 2
2 11
3 23
4 101
5 173
6 902
7 1562
8 1559
9 8120
10 14032
11 14033
12 73082
13 126290
14 604523
15 657743
16 723269
17 1136684
18 5918933
19 5972147
20 10227787
21 25051529
22 53276231
23 54333278
24 92071913
25 441753767
26 479669051
27 483743986
28 828662228
29 3971590751
30 4315446629

List of values

[1, 2, 11, 23, 101, 173, 902, 1562, 1559, 8120, 14032, 14033, 73082, 126290, 604523, 657743, 723269, 1136684, 5918933, 5972147, 10227787, 25051529, 53276231, 54333278, 92071913, 441753767, 479669051, 483743986, 828662228, 3971590751, 4315446629]

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

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