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 | 2 |
| 2 | 13 |
| 3 | 49 |
| 4 | 149 |
| 5 | 373 |
| 6 | 835 |
| 7 | 1727 |
| 8 | 3383 |
| 9 | 6341 |
| 10 | 11419 |
| 11 | 19966 |
| 12 | 34067 |
| 13 | 56967 |
| 14 | 93578 |
| 15 | 151313 |
| 16 | 241281 |
| 17 | 379934 |
| 18 | 591413 |
| 19 | 910879 |
| 20 | 1389289 |
| 21 | 2099905 |
| 22 | 3147743 |
| 23 | 4682362 |
| 24 | 6914234 |
| 25 | 10141072 |
| 26 | 14779023 |
| 27 | 21408820 |
| 28 | 30837491 |
| 29 | 44179913 |
| 30 | 62974570 |
| 31 | 89329823 |