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.

A309706 Smallest number that contains the first n primes as substrings in base 10. Substrings go from left to right, but numbers in the substrings can be separated by several numbers.

Table of values

n a(n)
1 2
2 23
3 235
4 2357
5 112357
6 112357
7 112357
8 1123579
9 1123579
10 1123579
11 1231579
12 1231579
13 12341579
14 12431579
15 12431579
16 12453179
17 12453179
18 124536179
19 124536179
20 1124536719
21 1234567139
22 1234567139
23 12345671839
24 12345671839
25 12456783197
26 102456783197
27 102456783197
28 102456783197

List of values

[2, 23, 235, 2357, 112357, 112357, 112357, 1123579, 1123579, 1123579, 1231579, 1231579, 12341579, 12431579, 12431579, 12453179, 12453179, 124536179, 124536179, 1124536719, 1234567139, 1234567139, 12345671839, 12345671839, 12456783197, 102456783197, 102456783197, 102456783197]

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

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