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) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 5 |
| 3 | 14 |
| 4 | 46 |
| 5 | 107 |
| 6 | 352 |
| 7 | 789 |
| 8 | 2314 |
| 9 | 5596 |
| 10 | 14734 |
| 11 | 34572 |
| 12 | 92715 |
| 13 | 210638 |
| 14 | 531342 |
| 15 | 1250635 |
| 16 | 3042596 |
| 17 | 6973974 |
| 18 | 16973478 |
| 19 | 38399806 |
| 20 | 91301956 |
| 21 | 207992892 |
| 22 | 483244305 |
| 23 | 1089029008 |
| 24 | 2533640066 |
| 25 | 5642905974 |
| 26 | 12912848789 |
| 27 | 28893132440 |
| 28 | 65342580250 |
| 29 | 144803524640 |