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 | 1 |
| 3 | 1 |
| 4 | 1 |
| 5 | 1 |
| 6 | 121 |
| 7 | 841 |
| 8 | 3361 |
| 9 | 10081 |
| 10 | 25201 |
| 11 | 3684241 |
| 12 | 50309281 |
| 13 | 369738721 |
| 14 | 1926648361 |
| 15 | 7980936601 |
| 16 | 1335634023361 |
| 17 | 27705746752321 |
| 18 | 302258931418081 |
| 19 | 2283161710263841 |
| 20 | 13419441405835201 |
| 21 | 2498339829188508481 |
| 22 | 70152448708746111961 |
| 23 | 1025314852704395518441 |