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 | 1435 |
| 2 | 7669 |
| 3 | 39721 |
| 4 | 199141 |
| 5 | 1021225 |
| 6 | 5208673 |
| 7 | 26526337 |
| 8 | 135336793 |
| 9 | 690045061 |
| 10 | 3518298991 |
| 11 | 17940920173 |
| 12 | 91480646389 |
| 13 | 466463146399 |
| 14 | 2378531818147 |
| 15 | 12128251046821 |
| 16 | 61842638080231 |
| 17 | 315339231002215 |
| 18 | 1607932492222021 |