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 | 10 |
| 3 | 129 |
| 4 | 2836 |
| 5 | 83061 |
| 6 | 3076386 |
| 7 | 136647824 |
| 8 | 7081061404 |
| 9 | 419223006090 |
| 10 | 27914819962058 |
| 11 | 2064872379041701 |
| 12 | 167986348586006675 |
| 13 | 14906892578198245332 |
| 14 | 1432903480780688968334 |
| 15 | 148318150277923875087238 |
| 16 | 16447662583606982784243526 |
| 17 | 1945436946407977282783367806 |
| 18 | 244476687257496605058725664611 |