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 | 1 |
| 2 | 28 |
| 3 | 45 |
| 4 | 153 |
| 5 | 325 |
| 6 | 4753 |
| 7 | 7381 |
| 8 | 29161 |
| 9 | 56953 |
| 10 | 65341 |
| 11 | 73536 |
| 12 | 166753 |
| 13 | 266085 |
| 14 | 270480 |
| 15 | 354061 |
| 16 | 1062153 |
| 17 | 1383616 |
| 18 | 3123750 |
| 19 | 3525840 |
| 20 | 3873936 |
| 21 | 5247180 |
| 22 | 5649841 |
| 23 | 6060421 |
| 24 | 6644835 |
| 25 | 6835753 |
| 26 | 6924781 |
| 27 | 7006896 |
| 28 | 7870528 |
| 29 | 9925740 |
| 30 | 10285380 |
| 31 | 12708361 |