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 | 10 |
| 2 | 64 |
| 3 | 334 |
| 4 | 1549 |
| 5 | 6652 |
| 6 | 27064 |
| 7 | 105796 |
| 8 | 401041 |
| 9 | 1483606 |
| 10 | 5380840 |
| 11 | 19198306 |
| 12 | 67559437 |
| 13 | 234963352 |
| 14 | 808919632 |
| 15 | 2760370984 |
| 16 | 9346519297 |
| 17 | 31429487170 |
| 18 | 105039380080 |
| 19 | 349114288150 |
| 20 | 1154561484781 |
| 21 | 3801030845140 |
| 22 | 12462203297224 |
| 23 | 40705156945324 |
| 24 | 132494756301649 |