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 | 484 |
| 3 | 2974 |
| 4 | 15495 |
| 5 | 68745 |
| 6 | 237576 |
| 7 | 804887 |
| 8 | 2408502 |
| 9 | 6896518 |
| 10 | 18962878 |
| 11 | 49914553 |
| 12 | 128946177 |
| 13 | 325003322 |
| 14 | 806285935 |
| 15 | 1976689512 |
| 16 | 4789781866 |
| 17 | 11521436034 |
| 18 | 27522800939 |
| 19 | 65396285319 |
| 20 | 154757348476 |
| 21 | 364908847989 |
| 22 | 858133879200 |