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 | 1 |
| 2 | 69 |
| 3 | 1064 |
| 4 | 8736 |
| 5 | 49350 |
| 6 | 216342 |
| 7 | 787968 |
| 8 | 2489448 |
| 9 | 7024407 |
| 10 | 18074875 |
| 11 | 43072848 |
| 12 | 96186272 |
| 13 | 203145852 |
| 14 | 408774588 |
| 15 | 788378400 |
| 16 | 1464523344 |
| 17 | 2631173181 |
| 18 | 4587701601 |
| 19 | 7785938104 |
| 20 | 12894168000 |
| 21 | 20882898530 |
| 22 | 33138238770 |