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 | 9 |
| 2 | 11 |
| 3 | 19 |
| 4 | 31 |
| 5 | 49 |
| 6 | 81 |
| 7 | 129 |
| 8 | 211 |
| 9 | 339 |
| 10 | 551 |
| 11 | 889 |
| 12 | 1441 |
| 13 | 2329 |
| 14 | 3771 |
| 15 | 6099 |
| 16 | 9871 |
| 17 | 15969 |
| 18 | 25841 |
| 19 | 41809 |
| 20 | 67651 |
| 21 | 109459 |
| 22 | 177111 |
| 23 | 286569 |
| 24 | 463681 |
| 25 | 750249 |
| 26 | 1213931 |
| 27 | 1964179 |
| 28 | 3178111 |
| 29 | 5142289 |
| 30 | 8320401 |
| 31 | 13462689 |
| 32 | 21783091 |
| 33 | 35245779 |
| 34 | 57028871 |
| 35 | 92274649 |
| 36 | 149303521 |
| 37 | 241578169 |