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.
| n | a(n) |
|---|---|
| 1 | 5 |
| 2 | 131 |
| 3 | 10301 |
| 4 | 1003001 |
| 5 | 100030001 |
| 6 | 100111001 |
| 7 | 101000010000101 |
| 8 | 10000010101000001 |
| 9 | 101000000010000000101 |
| 10 | 110000000010000000011 |
| 11 | 10000000000300000000001 |
| 12 | 10000100000100000100001 |
| 13 | 100000100000010000001000001 |
| 14 | 10000000000000300000000000001 |
| 15 | 10000000001000100010000000001 |