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 | 4 |
| 4 | 7 |
| 5 | 9 |
| 6 | 22 |
| 7 | 35 |
| 8 | 79 |
| 9 | 2992 |
| 10 | 3597 |
| 11 | 17523 |
| 12 | 28632 |
| 13 | 41470 |
| 14 | 53093 |
| 15 | 57406 |
| 16 | 14504930 |
| 17 | 42622213 |
| 18 | 188335162 |
| 19 | 322429556 |
| 20 | 1023003875 |
| 21 | 1328535963 |
| 22 | 3138645732 |
| 23 | 11618168524 |
| 24 | 137721814936 |
| 25 | 156929353744 |
| 26 | 166732460513 |
| 27 | 813398686532 |