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 | 1 |
| 3 | 1 |
| 4 | 2 |
| 5 | 5 |
| 6 | 11 |
| 7 | 24 |
| 8 | 57 |
| 9 | 141 |
| 10 | 350 |
| 11 | 881 |
| 12 | 2267 |
| 13 | 5920 |
| 14 | 15601 |
| 15 | 41497 |
| 16 | 111399 |
| 17 | 301293 |
| 18 | 819843 |
| 19 | 2243058 |
| 20 | 6167211 |
| 21 | 17029473 |
| 22 | 47200752 |
| 23 | 131270283 |
| 24 | 366195789 |
| 25 | 1024380648 |
| 26 | 2872770381 |
| 27 | 8074967031 |
| 28 | 22745832254 |
| 29 | 64196912681 |
| 30 | 181516532273 |
| 31 | 514107418321 |
| 32 | 1458407886019 |
| 33 | 4143318012685 |