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 | 30 |
| 2 | 84 |
| 3 | 162 |
| 4 | 264 |
| 5 | 390 |
| 6 | 540 |
| 7 | 714 |
| 8 | 912 |
| 9 | 1134 |
| 10 | 1380 |
| 11 | 1650 |
| 12 | 1944 |
| 13 | 2262 |
| 14 | 2604 |
| 15 | 2970 |
| 16 | 3360 |
| 17 | 3774 |
| 18 | 4212 |
| 19 | 4674 |
| 20 | 5160 |
| 21 | 5670 |
| 22 | 6204 |
| 23 | 6762 |
| 24 | 7344 |
| 25 | 7950 |
| 26 | 8580 |
| 27 | 9234 |
| 28 | 9912 |
| 29 | 10614 |
| 30 | 11340 |
| 31 | 12090 |
| 32 | 12864 |
| 33 | 13662 |
| 34 | 14484 |
| 35 | 15330 |
| 36 | 16200 |
| 37 | 17094 |
| 38 | 18012 |
| 39 | 18954 |
| 40 | 19920 |