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 | 5 |
| 3 | 20 |
| 4 | 52 |
| 5 | 117 |
| 6 | 225 |
| 7 | 400 |
| 8 | 656 |
| 9 | 1025 |
| 10 | 1525 |
| 11 | 2196 |
| 12 | 3060 |
| 13 | 4165 |
| 14 | 5537 |
| 15 | 7232 |
| 16 | 9280 |
| 17 | 11745 |
| 18 | 14661 |
| 19 | 18100 |
| 20 | 22100 |
| 21 | 26741 |
| 22 | 32065 |
| 23 | 38160 |
| 24 | 45072 |
| 25 | 52897 |
| 26 | 61685 |
| 27 | 71540 |
| 28 | 82516 |
| 29 | 94725 |
| 30 | 108225 |
| 31 | 123136 |
| 32 | 139520 |
| 33 | 157505 |
| 34 | 177157 |
| 35 | 198612 |
| 36 | 221940 |
| 37 | 247285 |
| 38 | 274721 |
| 39 | 304400 |