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) |
|---|---|
| 1 | 1 |
| 2 | 2 |
| 3 | 4 |
| 4 | 9 |
| 5 | 13 |
| 6 | 20 |
| 7 | 43 |
| 8 | 80 |
| 9 | 326 |
| 10 | 775 |
| 11 | 3894 |
| 12 | 5629 |
| 13 | 7103 |
| 14 | 10523 |
| 15 | 61005 |
| 16 | 355588 |
| 17 | 1124509 |
| 18 | 1824015 |
| 19 | 2052357 |
| 20 | 2719588 |
| 21 | 5241202 |
| 22 | 10253662 |
| 23 | 17480124 |
| 24 | 42664033 |
| 25 | 83470664 |
| 26 | 282411553 |
| 27 | 328711697 |
| 28 | 432040721 |
| 29 | 1247136427 |
| 30 | 4461350728 |
| 31 | 15082139743 |