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 | 2 |
| 3 | 3 |
| 4 | 6 |
| 5 | 10 |
| 6 | 21 |
| 7 | 39 |
| 8 | 82 |
| 9 | 163 |
| 10 | 347 |
| 11 | 717 |
| 12 | 1533 |
| 13 | 3232 |
| 14 | 6927 |
| 15 | 14748 |
| 16 | 31645 |
| 17 | 67690 |
| 18 | 145322 |
| 19 | 311535 |
| 20 | 668997 |
| 21 | 1435645 |
| 22 | 3083301 |
| 23 | 6619842 |
| 24 | 14218066 |
| 25 | 30533005 |
| 26 | 65580338 |
| 27 | 140847132 |
| 28 | 302522253 |
| 29 | 649759735 |
| 30 | 1395611508 |
| 31 | 2997573501 |
| 32 | 6438470626 |
| 33 | 13829057884 |
| 34 | 29703388721 |
| 35 | 63799607283 |
| 36 | 137035047576 |
| 37 | 294336860797 |
| 38 | 632205714741 |