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 | 216 |
| 2 | 948 |
| 3 | 1560 |
| 4 | 4872 |
| 5 | 8208 |
| 6 | 9828 |
| 7 | 18200 |
| 8 | 29640 |
| 9 | 37024 |
| 10 | 65536 |
| 11 | 89550 |
| 12 | 283800 |
| 13 | 535920 |
| 14 | 592956 |
| 15 | 649800 |
| 16 | 825930 |
| 17 | 1042320 |
| 18 | 1382400 |
| 19 | 1536220 |
| 20 | 3688230 |
| 21 | 4215120 |
| 22 | 4321800 |
| 23 | 5103210 |
| 24 | 19078930 |
| 25 | 21415680 |
| 26 | 24471720 |
| 27 | 214067490 |
| 28 | 435457620 |
| 29 | 535019100 |