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 | 15 |
| 2 | 40 |
| 3 | 156 |
| 4 | 400 |
| 5 | 1464 |
| 6 | 2380 |
| 7 | 5220 |
| 8 | 7240 |
| 9 | 12720 |
| 10 | 25260 |
| 11 | 30784 |
| 12 | 52060 |
| 13 | 70644 |
| 14 | 81400 |
| 15 | 106080 |
| 16 | 151740 |
| 17 | 208920 |
| 18 | 230764 |
| 19 | 305320 |
| 20 | 363024 |
| 21 | 394420 |
| 22 | 499360 |
| 23 | 578760 |
| 24 | 712980 |
| 25 | 922180 |
| 26 | 1040604 |
| 27 | 1103440 |
| 28 | 1236600 |
| 29 | 1307020 |
| 30 | 1455780 |
| 31 | 2064640 |
| 32 | 2265384 |