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 | 148 |
| 2 | 4690 |
| 3 | 57911 |
| 4 | 428949 |
| 5 | 2392915 |
| 6 | 11231300 |
| 7 | 46853641 |
| 8 | 179545949 |
| 9 | 646161612 |
| 10 | 2215310269 |
| 11 | 7295294696 |
| 12 | 23173431000 |
| 13 | 71137228340 |
| 14 | 211216789027 |
| 15 | 606907100518 |
| 16 | 1688654512840 |
| 17 | 4553248388246 |
| 18 | 11908977568334 |
| 19 | 30245780813181 |