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 | 16 |
| 3 | 103 |
| 4 | 169 |
| 5 | 1072 |
| 6 | 6799 |
| 7 | 11153 |
| 8 | 70736 |
| 9 | 448631 |
| 10 | 735929 |
| 11 | 4667504 |
| 12 | 29602847 |
| 13 | 48560161 |
| 14 | 307984528 |
| 15 | 1953339271 |
| 16 | 3204234697 |
| 17 | 20322311344 |
| 18 | 128890789039 |
| 19 | 211430929841 |
| 20 | 1340964564176 |
| 21 | 8504838737303 |
| 22 | 13951237134809 |
| 23 | 88483338924272 |
| 24 | 561190465872959 |
| 25 | 920570219967553 |