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.

A262581 Concatenation of the numbers from 1 to n but omitting 11.

Table of values

n a(n)
1 1
2 12
3 123
4 1234
5 12345
6 123456
7 1234567
8 12345678
9 123456789
10 12345678910
11 1234567891012
12 123456789101213
13 12345678910121314
14 1234567891012131415
15 123456789101213141516
16 12345678910121314151617
17 1234567891012131415161718
18 123456789101213141516171819
19 12345678910121314151617181920

List of values

[1, 12, 123, 1234, 12345, 123456, 1234567, 12345678, 123456789, 12345678910, 1234567891012, 123456789101213, 12345678910121314, 1234567891012131415, 123456789101213141516, 12345678910121314151617, 1234567891012131415161718, 123456789101213141516171819, 12345678910121314151617181920]

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

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