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 | 0 |
| 1 | 0 |
| 2 | 3 |
| 3 | 23 |
| 4 | 41 |
| 5 | 313 |
| 6 | 73 |
| 7 | 676 |
| 8 | 3439 |
| 9 | 38231 |
| 10 | 46169 |
| 11 | 602359 |
| 12 | 703999 |
| 13 | 10565707 |
| 14 | 12071497 |
| 15 | 13669093 |
| 16 | 30716561 |
| 17 | 582722017 |
| 18 | 215455199 |
| 19 | 4516351061 |
| 20 | 991731385 |
| 21 | 361369795 |
| 22 | 393466951 |
| 23 | 9817955321 |
| 24 | 31848396101 |
| 25 | 858318957533 |
| 26 | 922672670033 |
| 27 | 8903430207697 |
| 28 | 9522990978097 |