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 | 0 |
| 3 | 1 |
| 4 | 1 |
| 5 | 4 |
| 6 | 4 |
| 7 | 21 |
| 8 | 32 |
| 9 | 111 |
| 10 | 200 |
| 11 | 462 |
| 12 | 1162 |
| 13 | 1875 |
| 14 | 4195 |
| 15 | 9410 |
| 16 | 17978 |
| 17 | 24034 |
| 18 | 73175 |
| 19 | 79925 |
| 20 | 251808 |
| 21 | 358096 |
| 22 | 631919 |
| 23 | 796571 |
| 24 | 3104082 |
| 25 | 2980476 |
| 26 | 6088310 |
| 27 | 10167660 |
| 28 | 23661369 |
| 29 | 21477012 |
| 30 | 84485584 |