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) |
|---|---|
| 2 | 3 |
| 3 | 10 |
| 4 | 21 |
| 5 | 55 |
| 6 | 78 |
| 7 | 136 |
| 8 | 171 |
| 9 | 253 |
| 10 | 406 |
| 11 | 465 |
| 12 | 666 |
| 13 | 820 |
| 14 | 903 |
| 15 | 1081 |
| 16 | 1378 |
| 17 | 1711 |
| 18 | 1830 |
| 19 | 2211 |
| 20 | 2485 |
| 21 | 2628 |
| 22 | 3081 |
| 23 | 3403 |
| 24 | 3916 |
| 25 | 4656 |
| 26 | 5050 |