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) |
|---|---|
| 3 | 17 |
| 4 | 56 |
| 5 | 207 |
| 6 | 839 |
| 7 | 3579 |
| 8 | 16124 |
| 9 | 76037 |
| 10 | 373772 |
| 11 | 1907842 |
| 12 | 10080307 |
| 13 | 54988156 |
| 14 | 308997810 |
| 15 | 1785241070 |
| 16 | 10586718392 |
| 17 | 64343528516 |
| 18 | 400271482199 |
| 19 | 2545649131486 |
| 20 | 16533901290930 |
| 21 | 109563921896553 |
| 22 | 740108482190948 |
| 23 | 5092272608657314 |
| 24 | 35661352536071043 |