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 | 28 |
| 2 | 78 |
| 3 | 248 |
| 4 | 684 |
| 5 | 1862 |
| 6 | 3294 |
| 7 | 6140 |
| 8 | 9144 |
| 9 | 16590 |
| 10 | 27872 |
| 11 | 37734 |
| 12 | 59094 |
| 13 | 75812 |
| 14 | 90864 |
| 15 | 121878 |
| 16 | 171780 |
| 17 | 219542 |
| 18 | 257244 |
| 19 | 328104 |
| 20 | 378362 |
| 21 | 432240 |
| 22 | 530964 |
| 23 | 627570 |
| 24 | 785078 |
| 25 | 969714 |
| 26 | 1071512 |
| 27 | 1157004 |
| 28 | 1271270 |
| 29 | 1366974 |
| 30 | 1649024 |
| 31 | 2145924 |