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 | 4 |
| 2 | 20 |
| 3 | 40 |
| 4 | 100 |
| 5 | 172 |
| 6 | 248 |
| 7 | 336 |
| 8 | 568 |
| 9 | 820 |
| 10 | 1100 |
| 11 | 1400 |
| 12 | 1692 |
| 13 | 2012 |
| 14 | 2352 |
| 15 | 2720 |
| 16 | 3632 |
| 17 | 4580 |
| 18 | 5572 |
| 19 | 6600 |
| 20 | 7700 |
| 21 | 8844 |
| 22 | 10024 |
| 23 | 11248 |
| 24 | 12392 |
| 25 | 13588 |
| 26 | 14844 |
| 27 | 16152 |
| 28 | 17484 |
| 29 | 18876 |
| 30 | 20320 |
| 31 | 21824 |
| 32 | 25440 |
| 33 | 29124 |
| 34 | 32884 |
| 35 | 36712 |
| 36 | 40644 |
| 37 | 44652 |
| 38 | 48728 |
| 39 | 52880 |