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 | 0 |
| 1 | 1 |
| 2 | 2 |
| 3 | 4 |
| 4 | 5 |
| 5 | 9 |
| 6 | 11 |
| 7 | 16 |
| 8 | 14 |
| 9 | 25 |
| 10 | 36 |
| 11 | 59 |
| 12 | 99 |
| 13 | 209 |
| 14 | 419 |
| 15 | 860 |
| 16 | 1730 |
| 17 | 3862 |
| 18 | 9464 |
| 19 | 21868 |
| 20 | 74371 |
| 21 | 244648 |
| 22 | 727345 |
| 23 | 3098351 |
| 24 | 13469007 |
| 25 | 56269849 |
| 26 | 281642632 |
| 27 | 1406177909 |
| 28 | 9597415332 |
| 29 | 58891421656 |
| 30 | 411673964638 |
| 31 | 3406742649805 |
| 32 | 24202753250241 |
| 33 | 176482943622608 |