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 | 22 |
| 4 | 97 |
| 5 | 436 |
| 6 | 1994 |
| 7 | 9241 |
| 8 | 43257 |
| 9 | 204052 |
| 10 | 968440 |
| 11 | 4619011 |
| 12 | 22120630 |
| 13 | 106300507 |
| 14 | 512321437 |
| 15 | 2475395302 |
| 16 | 11986728457 |
| 17 | 58156146652 |
| 18 | 282640193312 |
| 19 | 1375737276787 |
| 20 | 6705522150972 |
| 21 | 32724071280517 |
| 22 | 159878425878847 |
| 23 | 781910419686412 |
| 24 | 3827639591654862 |
| 25 | 18753350784435811 |