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 | 13 |
| 2 | 113 |
| 3 | 886 |
| 4 | 2861 |
| 5 | 9213 |
| 6 | 93855 |
| 7 | 298053 |
| 8 | 1359738 |
| 9 | 2967970 |
| 10 | 26189480 |
| 11 | 220183761 |
| 12 | 433461519 |
| 13 | 3462498821 |
| 14 | 28962801813 |
| 15 | 43462498821 |
| 16 | 722411301260 |
| 17 | 942809540088 |
| 18 | 9049247973113 |
| 19 | 29354537778480 |
| 20 | 195230348268113 |
| 21 | 1970200215432144 |
| 22 | 2426703296418144 |
| 23 | 2233582298883761 |
| 24 | 93802389568778480 |
| 25 | 242669917148548480 |