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 | 1 |
| 2 | 5 |
| 3 | 13 |
| 4 | 85 |
| 5 | 61 |
| 6 | 221 |
| 7 | 761 |
| 8 | 1013 |
| 9 | 2813 |
| 10 | 12013 |
| 11 | 23545 |
| 12 | 54781 |
| 13 | 16381 |
| 14 | 196565 |
| 15 | 425965 |
| 16 | 770041 |
| 17 | 3137513 |
| 18 | 7663613 |
| 19 | 13629421 |
| 20 | 20962813 |
| 21 | 63946741 |
| 22 | 121602013 |
| 23 | 192805885 |
| 24 | 499122013 |
| 25 | 989724541 |
| 26 | 2411720701 |
| 27 | 6435110905 |
| 28 | 17162301181 |
| 29 | 29929502461 |
| 30 | 63753420281 |