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 | 0 |
| 1 | 0 |
| 2 | 0 |
| 3 | 1 |
| 4 | 5 |
| 5 | 18 |
| 6 | 53 |
| 7 | 135 |
| 8 | 305 |
| 9 | 633 |
| 10 | 1220 |
| 11 | 2217 |
| 12 | 3834 |
| 13 | 6359 |
| 14 | 10172 |
| 15 | 15776 |
| 16 | 23807 |
| 17 | 35075 |
| 18 | 50585 |
| 19 | 71576 |
| 20 | 99551 |
| 21 | 136332 |
| 22 | 184084 |
| 23 | 245384 |
| 24 | 323260 |
| 25 | 421256 |
| 26 | 543484 |
| 27 | 694709 |
| 28 | 880393 |
| 29 | 1106798 |
| 30 | 1381049 |
| 31 | 1711231 |
| 32 | 2106469 |
| 33 | 2577049 |
| 34 | 3134488 |
| 35 | 3791677 |
| 36 | 4562974 |
| 37 | 5464339 |
| 38 | 6513448 |