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 | 8 |
| 1 | 1 |
| 2 | 57 |
| 3 | 358 |
| 4 | 2605 |
| 5 | 18551 |
| 6 | 132504 |
| 7 | 946037 |
| 8 | 6754805 |
| 9 | 48229630 |
| 10 | 344362257 |
| 11 | 2458765387 |
| 12 | 17555720008 |
| 13 | 125348805401 |
| 14 | 894997357857 |
| 15 | 6390330310358 |
| 16 | 45627309530405 |
| 17 | 325781497023151 |
| 18 | 2326097788692504 |
| 19 | 16608466017870637 |
| 20 | 118585359913787005 |
| 21 | 846705985414379630 |