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 | 2 |
| 2 | 45 |
| 3 | 182 |
| 4 | 685 |
| 5 | 2036 |
| 6 | 5153 |
| 7 | 11370 |
| 8 | 23035 |
| 9 | 43284 |
| 10 | 76523 |
| 11 | 129052 |
| 12 | 208597 |
| 13 | 324900 |
| 14 | 491519 |
| 15 | 723994 |
| 16 | 1041095 |
| 17 | 1467042 |
| 18 | 2029069 |
| 19 | 2759166 |
| 20 | 3697749 |
| 21 | 4888510 |
| 22 | 6381185 |
| 23 | 8237500 |
| 24 | 10523625 |
| 25 | 13313648 |
| 26 | 16697587 |
| 27 | 20769202 |
| 28 | 25633157 |
| 29 | 31415424 |
| 30 | 38246327 |