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 | 3 |
| 4 | 5 |
| 5 | 9 |
| 6 | 17 |
| 7 | 34 |
| 8 | 71 |
| 9 | 154 |
| 10 | 346 |
| 11 | 802 |
| 12 | 1914 |
| 13 | 4693 |
| 14 | 11800 |
| 15 | 30379 |
| 16 | 79963 |
| 17 | 214925 |
| 18 | 589223 |
| 19 | 1645994 |
| 20 | 4681037 |
| 21 | 13541446 |
| 22 | 39817560 |
| 23 | 118925810 |
| 24 | 360577616 |
| 25 | 1109158545 |
| 26 | 3459636358 |
| 27 | 10936941299 |
| 28 | 35026082521 |
| 29 | 113588037953 |