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 | 5 |
| 2 | 9 |
| 3 | 16 |
| 4 | 35 |
| 5 | 76 |
| 6 | 190 |
| 7 | 455 |
| 8 | 1156 |
| 9 | 2911 |
| 10 | 7438 |
| 11 | 18992 |
| 12 | 48902 |
| 13 | 125968 |
| 14 | 325975 |
| 15 | 845202 |
| 16 | 2197690 |
| 17 | 5725854 |
| 18 | 14951308 |
| 19 | 39110371 |
| 20 | 102490649 |
| 21 | 269002564 |
| 22 | 707096093 |
| 23 | 1861183847 |
| 24 | 4905172383 |
| 25 | 12942843424 |