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 | 143 |
| 2 | 253 |
| 3 | 440 |
| 4 | 1133 |
| 5 | 1397 |
| 6 | 3608 |
| 7 | 6325 |
| 8 | 11495 |
| 9 | 20152 |
| 10 | 52063 |
| 11 | 64207 |
| 12 | 165880 |
| 13 | 290807 |
| 14 | 528517 |
| 15 | 926552 |
| 16 | 2393765 |
| 17 | 2952125 |
| 18 | 7626872 |
| 19 | 13370797 |
| 20 | 24300287 |
| 21 | 42601240 |
| 22 | 110061127 |
| 23 | 135733543 |
| 24 | 350670232 |
| 25 | 614765855 |
| 26 | 1117284685 |
| 27 | 1958730488 |
| 28 | 5060418077 |
| 29 | 6240790853 |