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 | 1 |
| 1 | 1 |
| 2 | 4 |
| 3 | 25 |
| 4 | 116 |
| 5 | 164 |
| 6 | 194 |
| 7 | 16481 |
| 8 | 11690 |
| 9 | 1664364 |
| 10 | 136498136 |
| 11 | 2564496436 |
| 12 | 4064014 |
| 13 | 491648100 |
| 14 | 436491616160 |
| 15 | 81368116641625 |
| 16 | 9259254936490 |
| 17 | 148136161649810 |
| 18 | 164949369644900 |
| 19 | 149364943691810 |
| 20 | 362536161401640 |
| 21 | 41616363643649040 |
| 22 | 811166442536936160 |