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) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 1 |
| 3 | 3 |
| 4 | 7 |
| 5 | 15 |
| 6 | 29 |
| 7 | 54 |
| 8 | 102 |
| 9 | 197 |
| 10 | 375 |
| 11 | 687 |
| 12 | 1226 |
| 13 | 2182 |
| 14 | 3885 |
| 15 | 6828 |
| 16 | 11767 |
| 17 | 19971 |
| 18 | 33519 |
| 19 | 55525 |
| 20 | 90293 |
| 21 | 143350 |
| 22 | 221149 |
| 23 | 329472 |
| 24 | 467362 |
| 25 | 611441 |
| 26 | 683794 |
| 27 | 487644 |
| 28 | -425932 |
| 29 | -3026915 |
| 30 | -9327152 |
| 31 | -23364105 |
| 32 | -53026834 |
| 33 | -113415526 |
| 34 | -232986460 |
| 35 | -464621237 |
| 36 | -905199293 |