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 | 1 |
| 1 | 2 |
| 2 | 25 |
| 3 | 52 |
| 4 | 649 |
| 5 | 1350 |
| 6 | 16849 |
| 7 | 35048 |
| 8 | 437425 |
| 9 | 909898 |
| 10 | 11356201 |
| 11 | 23622300 |
| 12 | 294823801 |
| 13 | 613269902 |
| 14 | 7654062625 |
| 15 | 15921395152 |
| 16 | 198710804449 |
| 17 | 413343004050 |
| 18 | 5158826853049 |
| 19 | 10730996710148 |
| 20 | 133930787374825 |
| 21 | 278592571459798 |
| 22 | 3477041644892401 |
| 23 | 7232675861244600 |