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) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 1 |
| 3 | 7 |
| 4 | 7 |
| 5 | 37 |
| 6 | 49 |
| 7 | 199 |
| 8 | 319 |
| 9 | 1093 |
| 10 | 1993 |
| 11 | 6103 |
| 12 | 12151 |
| 13 | 34501 |
| 14 | 72961 |
| 15 | 196807 |
| 16 | 433807 |
| 17 | 1129957 |
| 18 | 2562649 |
| 19 | 6517399 |
| 20 | 15073159 |
| 21 | 37712293 |
| 22 | 88400593 |
| 23 | 218707783 |
| 24 | 517427551 |
| 25 | 1270340101 |
| 26 | 3024553321 |
| 27 | 7386555607 |
| 28 | 17663446807 |
| 29 | 42981884677 |
| 30 | 103090345249 |