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 | 3 |
| 2 | 5 |
| 3 | 8 |
| 4 | 15 |
| 5 | 27 |
| 6 | 58 |
| 7 | 115 |
| 8 | 252 |
| 9 | 541 |
| 10 | 1196 |
| 11 | 2629 |
| 12 | 5894 |
| 13 | 13156 |
| 14 | 29667 |
| 15 | 66978 |
| 16 | 151966 |
| 17 | 345497 |
| 18 | 788396 |
| 19 | 1802678 |
| 20 | 4133161 |
| 21 | 9495317 |
| 22 | 21861393 |
| 23 | 50423468 |
| 24 | 116514553 |
| 25 | 269666605 |
| 26 | 625108573 |
| 27 | 1451128479 |
| 28 | 3373267275 |
| 29 | 7851415838 |
| 30 | 18296568717 |