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 | 2 |
| 2 | 11 |
| 3 | 43 |
| 4 | 209 |
| 5 | 1042 |
| 6 | 6771 |
| 7 | 26823 |
| 8 | 130599 |
| 9 | 651237 |
| 10 | 3255306 |
| 11 | 21158903 |
| 12 | 83821639 |
| 13 | 408121757 |
| 14 | 2035115566 |
| 15 | 13224589033 |
| 16 | 52388661704 |
| 17 | 331370112102 |
| 18 | 1691563962301 |
| 19 | 6567827879588 |
| 20 | 41430886596044 |
| 21 | 211450306579272 |
| 22 | 1059399469695886 |
| 23 | 5298071316879193 |
| 24 | 20530429091056784 |