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 | 22 |
| 2 | 169 |
| 3 | 879 |
| 4 | 3902 |
| 5 | 16420 |
| 6 | 68282 |
| 7 | 284254 |
| 8 | 1187830 |
| 9 | 4979464 |
| 10 | 20913026 |
| 11 | 87905004 |
| 12 | 369597368 |
| 13 | 1554028138 |
| 14 | 6533901986 |
| 15 | 27470619810 |
| 16 | 115492192540 |
| 17 | 485546657850 |
| 18 | 2041301158120 |
| 19 | 8581884687952 |
| 20 | 36079321433650 |
| 21 | 151682073514422 |