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 | 0 |
| 2 | 1 |
| 3 | 5 |
| 4 | 11 |
| 5 | 699 |
| 6 | 1409 |
| 7 | 2119 |
| 8 | 2829 |
| 9 | 3539 |
| 10 | 4249 |
| 11 | 4959 |
| 12 | 5669 |
| 13 | 6379 |
| 14 | 7089 |
| 15 | 7799 |
| 16 | 8509 |
| 17 | 9219 |
| 18 | 9929 |
| 19 | 10639 |
| 20 | 11349 |
| 21 | 12059 |
| 22 | 12769 |
| 23 | 13479 |
| 24 | 14189 |
| 25 | 14899 |
| 26 | 15609 |
| 27 | 16319 |
| 28 | 17029 |
| 29 | 17739 |
| 30 | 18449 |
| 31 | 19159 |
| 32 | 19869 |
| 33 | 20579 |
| 34 | 21289 |
| 35 | 21999 |
| 36 | 22709 |
| 37 | 23419 |
| 38 | 24129 |
| 39 | 24839 |
| 40 | 25549 |
| 41 | 26259 |
| 42 | 26969 |