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 | 1 |
| 2 | 15 |
| 3 | 21 |
| 4 | 55 |
| 5 | 1225 |
| 6 | 2211 |
| 7 | 5151 |
| 8 | 15225 |
| 9 | 21115 |
| 10 | 22155 |
| 11 | 151525 |
| 12 | 222111 |
| 13 | 255255 |
| 14 | 11551221 |
| 15 | 12552555 |
| 16 | 21115251 |
| 17 | 22221111 |
| 18 | 51151555 |
| 19 | 111221155 |
| 20 | 251115255 |
| 21 | 2222211111 |
| 22 | 2552515525 |
| 23 | 111251152551 |
| 24 | 122515222515 |
| 25 | 222222111111 |
| 26 | 1125152255151 |
| 27 | 2522551111515 |
| 28 | 5255121522225 |