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 | 1 |
| 3 | 3 |
| 4 | 6 |
| 5 | 15 |
| 6 | 31 |
| 7 | 92 |
| 8 | 161 |
| 9 | 464 |
| 10 | 2347 |
| 11 | 3987 |
| 12 | 18202 |
| 13 | 50136 |
| 14 | 81722 |
| 15 | 214976 |
| 16 | 903048 |
| 17 | 3684567 |
| 18 | 5842249 |
| 19 | 23206424 |
| 20 | 57341256 |
| 21 | 89938662 |
| 22 | 343306266 |
| 23 | 829972421 |
| 24 | 3084219358 |
| 25 | 17375700038 |
| 26 | 40920517008 |
| 27 | 62656899579 |
| 28 | 146415515992 |
| 29 | 223442878751 |
| 30 | 518427758704 |
| 31 | 9544240589455 |
| 32 | 21746920337606 |