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 | 1 |
| 3 | 1 |
| 4 | 2 |
| 5 | 5 |
| 6 | 10 |
| 7 | 18 |
| 8 | 38 |
| 9 | 91 |
| 10 | 211 |
| 11 | 472 |
| 12 | 1108 |
| 13 | 2754 |
| 14 | 6881 |
| 15 | 17101 |
| 16 | 43443 |
| 17 | 113565 |
| 18 | 300142 |
| 19 | 797191 |
| 20 | 2147414 |
| 21 | 5883976 |
| 22 | 16293712 |
| 23 | 45471429 |
| 24 | 128285353 |
| 25 | 366266188 |
| 26 | 1055534118 |
| 27 | 3066483484 |
| 28 | 8989837397 |
| 29 | 26602652605 |
| 30 | 79370560477 |
| 31 | 238606427241 |
| 32 | 722973445270 |