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 | 1 |
| 3 | 2 |
| 4 | 5 |
| 5 | 13 |
| 6 | 32 |
| 7 | 79 |
| 8 | 193 |
| 9 | 478 |
| 10 | 1196 |
| 11 | 3037 |
| 12 | 7802 |
| 13 | 20287 |
| 14 | 53259 |
| 15 | 141069 |
| 16 | 376449 |
| 17 | 1011295 |
| 18 | 2732453 |
| 19 | 7421128 |
| 20 | 20247355 |
| 21 | 55469186 |
| 22 | 152524366 |
| 23 | 420807220 |
| 24 | 1164532203 |
| 25 | 3231706847 |
| 26 | 8991343356 |
| 27 | 25075077684 |
| 28 | 70082143952 |
| 29 | 196268698259 |
| 30 | 550695545855 |
| 31 | 1547867058852 |