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 | 2 |
| 1 | 5 |
| 2 | 13 |
| 3 | 35 |
| 4 | 103 |
| 5 | 345 |
| 6 | 1325 |
| 7 | 5911 |
| 8 | 30067 |
| 9 | 172237 |
| 10 | 1096319 |
| 11 | 7677155 |
| 12 | 58648421 |
| 13 | 485377457 |
| 14 | 4326008691 |
| 15 | 41310343279 |
| 16 | 420783672791 |
| 17 | 4553946567241 |
| 18 | 52184383350787 |
| 19 | 631210595896453 |
| 20 | 8036822912123765 |
| 21 | 107444407853010597 |
| 22 | 1504827158220643895 |
| 23 | 22034062627659931905 |