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 | 510 |
| 3 | 642 |
| 4 | 3394440 |
| 5 | 3629640 |
| 6 | 3653640 |
| 7 | 3663240 |
| 8 | 3673080 |
| 9 | 3701160 |
| 10 | 3736920 |
| 11 | 3901080 |
| 12 | 3958680 |
| 13 | 4077960 |
| 14 | 4137240 |
| 15 | 4240920 |
| 16 | 4251480 |
| 17 | 4256520 |
| 18 | 4273320 |
| 19 | 4274520 |
| 20 | 4319880 |
| 21 | 7300854 |
| 22 | 12798240 |
| 23 | 13362720 |
| 24 | 14405664 |
| 25 | 15170820 |
| 26 | 16173024 |
| 27 | 16342368 |
| 28 | 16354884 |
| 29 | 16361184 |
| 30 | 16957668 |
| 31 | 17113404 |