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 | 12 |
| 2 | 40 |
| 3 | 84 |
| 4 | 144 |
| 5 | 220 |
| 6 | 312 |
| 7 | 420 |
| 8 | 544 |
| 9 | 684 |
| 10 | 840 |
| 11 | 1012 |
| 12 | 1200 |
| 13 | 1404 |
| 14 | 1624 |
| 15 | 1860 |
| 16 | 2112 |
| 17 | 2380 |
| 18 | 2664 |
| 19 | 2964 |
| 20 | 3280 |
| 21 | 3612 |
| 22 | 3960 |
| 23 | 4324 |
| 24 | 4704 |
| 25 | 5100 |
| 26 | 5512 |
| 27 | 5940 |
| 28 | 6384 |
| 29 | 6844 |
| 30 | 7320 |
| 31 | 7812 |
| 32 | 8320 |
| 33 | 8844 |
| 34 | 9384 |
| 35 | 9940 |
| 36 | 10512 |
| 37 | 11100 |
| 38 | 11704 |
| 39 | 12324 |
| 40 | 12960 |
| 41 | 13612 |
| 42 | 14280 |