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 | 86 |
| 2 | 1915 |
| 3 | 15791 |
| 4 | 86439 |
| 5 | 386495 |
| 6 | 1548633 |
| 7 | 5773556 |
| 8 | 20277077 |
| 9 | 67308910 |
| 10 | 211460339 |
| 11 | 629882429 |
| 12 | 1783655626 |
| 13 | 4817110825 |
| 14 | 12451066977 |
| 15 | 30910052731 |
| 16 | 73949198559 |
| 17 | 171030335166 |
| 18 | 383497912713 |
| 19 | 835834876572 |
| 20 | 1774757616717 |
| 21 | 3678712344867 |