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 | 3 |
| 3 | 7 |
| 4 | 29 |
| 5 | 69 |
| 6 | 287 |
| 7 | 683 |
| 8 | 2841 |
| 9 | 6761 |
| 10 | 28123 |
| 11 | 66927 |
| 12 | 278389 |
| 13 | 662509 |
| 14 | 2755767 |
| 15 | 6558163 |
| 16 | 27279281 |
| 17 | 64919121 |
| 18 | 270037043 |
| 19 | 642633047 |
| 20 | 2673091149 |
| 21 | 6361411349 |
| 22 | 26460874447 |
| 23 | 62971480443 |
| 24 | 261935653321 |
| 25 | 623353393081 |
| 26 | 2592895658763 |