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 | 0 |
| 2 | 0 |
| 3 | 0 |
| 4 | 0 |
| 5 | 1 |
| 6 | 4 |
| 7 | 7 |
| 8 | 13 |
| 9 | 25 |
| 10 | 45 |
| 11 | 80 |
| 12 | 136 |
| 13 | 251 |
| 14 | 443 |
| 15 | 784 |
| 16 | 1377 |
| 17 | 2420 |
| 18 | 4312 |
| 19 | 7756 |
| 20 | 14106 |
| 21 | 25554 |
| 22 | 46776 |
| 23 | 85774 |
| 24 | 157325 |
| 25 | 290773 |
| 26 | 538520 |
| 27 | 1000321 |
| 28 | 1861364 |
| 29 | 3473165 |
| 30 | 6493997 |
| 31 | 12167342 |
| 32 | 22851920 |
| 33 | 42987462 |
| 34 | 81018661 |
| 35 | 152945700 |
| 36 | 289206487 |
| 37 | 547722346 |
| 38 | 1038786862 |