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 | 9 |
| 4 | 26 |
| 5 | 82 |
| 6 | 259 |
| 7 | 817 |
| 8 | 2583 |
| 9 | 8166 |
| 10 | 25821 |
| 11 | 81650 |
| 12 | 258200 |
| 13 | 816497 |
| 14 | 2581990 |
| 15 | 8164966 |
| 16 | 25819890 |
| 17 | 81649659 |
| 18 | 258198890 |
| 19 | 816496582 |
| 20 | 2581988898 |
| 21 | 8164965810 |
| 22 | 25819888975 |
| 23 | 81649658093 |
| 24 | 258198889748 |
| 25 | 816496580928 |
| 26 | 2581988897472 |
| 27 | 8164965809278 |
| 28 | 25819888974717 |
| 29 | 81649658092773 |