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 | 3 |
| 4 | 4 |
| 5 | 9 |
| 6 | 10 |
| 7 | 27 |
| 8 | 70 |
| 9 | 57 |
| 10 | 100 |
| 11 | 267 |
| 12 | 1060 |
| 13 | 1227 |
| 14 | 27790 |
| 15 | 1479 |
| 16 | 146380 |
| 17 | 3459 |
| 18 | 2508040 |
| 19 | 49527 |
| 20 | 35506900 |
| 21 | 470079 |