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 | 5 |
| 2 | 29 |
| 3 | 113 |
| 4 | 197 |
| 5 | 521 |
| 6 | 1109 |
| 7 | 1733 |
| 8 | 6389 |
| 9 | 7349 |
| 10 | 35603 |
| 11 | 148517 |
| 12 | 180797 |
| 13 | 402593 |
| 14 | 406907 |
| 15 | 2339039 |
| 16 | 5521721 |
| 17 | 11157989 |
| 18 | 20831267 |
| 19 | 22440701 |
| 20 | 27681263 |
| 21 | 73451723 |
| 22 | 241563407 |
| 23 | 953758109 |
| 24 | 1444257671 |
| 25 | 1917281213 |
| 26 | 6822753629 |
| 27 | 15867286361 |
| 28 | 28265029631 |
| 29 | 40841579819 |
| 30 | 177858259463 |