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 | 1 |
| 1 | 3 |
| 2 | 6 |
| 3 | 13 |
| 4 | 33 |
| 5 | 101 |
| 6 | 372 |
| 7 | 1624 |
| 8 | 8263 |
| 9 | 48285 |
| 10 | 320031 |
| 11 | 2380114 |
| 12 | 19675986 |
| 13 | 179314868 |
| 14 | 1788473424 |
| 15 | 19398149629 |
| 16 | 227510745445 |
| 17 | 2871040422932 |
| 18 | 38810001746171 |
| 19 | 559745948482030 |
| 20 | 8582882169611759 |
| 21 | 139467832061599433 |