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 | 25 |
| 2 | 625 |
| 3 | 2141 |
| 4 | 8327 |
| 5 | 38911 |
| 6 | 140295 |
| 7 | 467686 |
| 8 | 1623957 |
| 9 | 5467589 |
| 10 | 17779942 |
| 11 | 57847658 |
| 12 | 186862280 |
| 13 | 594627012 |
| 14 | 1880223340 |
| 15 | 5915390781 |
| 16 | 18465652946 |
| 17 | 57306451587 |
| 18 | 177068551553 |
| 19 | 544446252694 |
| 20 | 1666721759718 |
| 21 | 5084288683371 |
| 22 | 15456590300469 |