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 | 4 |
| 3 | 14 |
| 4 | 44 |
| 5 | 134 |
| 6 | 400 |
| 7 | 1184 |
| 8 | 3488 |
| 9 | 10253 |
| 10 | 30108 |
| 11 | 88386 |
| 12 | 259492 |
| 13 | 762085 |
| 14 | 2239120 |
| 15 | 6582280 |
| 16 | 19360432 |
| 17 | 56976859 |
| 18 | 167774428 |
| 19 | 494301778 |
| 20 | 1457104948 |
| 21 | 4297477252 |
| 22 | 12680944960 |
| 23 | 37436553544 |
| 24 | 110569987344 |
| 25 | 326713395019 |
| 26 | 965775778420 |